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Mechanical, hydraulic, or pneumatic, lifting device
A jack is a mechanical lifting device. Most often, the term "jack" denotes equipment used to apply great forces or lift heavy loads. There are also smaller
Jack_(device)
Topics referred to by the same term
equipment Jack (device), a device used to lift heavy objects Jackscrew, a device used to support heavy objects at various heights Pallet jack, a device with
Jack
Topics referred to by the same term
Look up car jack or carjack in Wiktionary, the free dictionary. Car jack or carjack may refer to: Jack (device), a mechanical lifting device used to apply
Car_jack
Family of connectors typically used for analog signals
& OMTP". Headset Buddy Help. Retrieved 2020-04-24. "3.5 mm Headset Jack: Device Specification". Android Open Source Project. "Smartphone Headset Standards:
Phone_connector_(audio)
Form of birth control involving a device placed in the uterus
intrauterine device (IUD), also known as an intrauterine contraceptive device (IUCD or ICD), is a small, T-shaped birth control device that is inserted
Intrauterine_device
VoIP product, Telecom company
telephone service (VoIP). Originally, MagicJack required a computer to work. Users connected a small device to their computer, and with an internet connection
MagicJack
American YouTuber and online streamer (born 2003)
Jack Colin Doherty (born October 8, 2003) is an American influencer, YouTuber, and online streamer best known for performing stunts and pranks. He first
Jack_Doherty_(YouTuber)
Topics referred to by the same term
Barrel jack may refer to: A type of heavy-duty jack (device), used for lifting vehicles or other heavy loads off the ground for maintenance and repair
Barrel_jack
USB wireless receiver
some Unifying devices were still being sold that were vulnerable to the original 2016 MouseJacking attack. Bluetooth Human interface device Logitech Harmony
Logitech_Unifying_receiver
Animal pest killer
The M44 cyanide device (also called a cyanide gun, cyanide trap, or canid pest ejector) is used to kill coyotes, feral dogs, and foxes. It is made from
M44_(cyanide_device)
Topics referred to by the same term
Look up jacking in Wiktionary, the free dictionary. Jacking may refer to: Jacking, use of a jack, a mechanical lifting device Jacking (dance), a freestyle
Jacking
Equipment and procedure in material handling
Cargo net Chain Chain hoist Come-along Crane (machine) Hook Hoist (device) Jack (device) Knot Lever Lifting bag Lifting beam Link (chain) Pry bar Rope Shackle
Rigging_(material_handling)
Flag of the United Kingdom
maritime flag use of jack was "A ship's flag of a smaller size than the ensign, used at sea as a signal, or as an identifying device". The jack was flown in the
Union_Jack
American television series (2018–2023)
Tom Clancy's Jack Ryan (also known simply as Jack Ryan) is an American political action thriller television series based on characters from the fictional
Jack_Ryan_(TV_series)
Flat structure to transport goods
stable fashion while being lifted by a forklift, a pallet jack, a front loader, a jacking device, or an erect crane. Many pallets can handle a load of 1
Pallet
Device that separates the carrier's wiring from the customer's
In telecommunications, a network interface device (NID; also known by several other names) is a device that serves as the demarcation point between the
Network_interface_device
Tool driven by compressed air supplied by an air compressor
wrenches Nail gun Jackhammer Pneumatic hammer Pneumatic drill Pneumatic jack (device) Pneumatic paint shaker Pneumatic riveter Sanders Sandblaster Shears
Pneumatic_tool
Machine allowing an individual to die quickly with minimal pain
ethics of euthanasia and the use of euthanasia devices. Invented by Jack Kevorkian, who used this device and called it a "Thanatron" or death machine (after
Euthanasia_device
Gear and pawl; prevents motion in one direction
keyboards Freewheel (overrunning clutch) Grease guns Handcuffs Jacks Anti-rollback devices used in roller coasters Looms Seatbelts Select-fire switch Slacklines
Ratchet_(device)
New Zealand hacker, programmer and computer security professional
medical devices. At the time of his death, Jack was Director of Embedded Device Security at IOActive. At a Black Hat conference in 2010, Jack gave a presentation
Barnaby_Jack
Device featuring a number of jacks for connecting and routing circuits
A patch panel is a device or unit featuring a number of jacks, usually of the same or similar type, for the use of connecting and routing circuits for
Patch_panel
American fast-food restaurant chain
Jack in the Box, Inc. is an American fast food restaurant chain founded on February 21, 1951, by Robert O. Peterson in San Diego, California, where it
Jack_in_the_Box
American pathologist and euthanasia activist (1928–2011)
deaths were assisted by means of a device which delivered the euthanizing drugs intravenously. Kevorkian called the device a "Thanatron" ("Death machine"
Jack_Kevorkian
American entrepreneur (born 1976)
Jack Patrick Dorsey (born November 19, 1976) is an American tech entrepreneur and businessman who co-founded Twitter, Inc., which operated social media
Jack_Dorsey
Technology to disable microphones
simultaneous charging and protection against juice jacking). In addition to blockers that can be plugged into devices, there are also tray-style active blockers
Microphone_blocker
American businessman, entertainment and manager
Jack Leon Gordon (November 10, 1939 – April 19, 2005), also known as Samuel Isaac Gordon and Clifford William Johnson, was an American businessman and
Jack Gordon (entertainment manager)
Jack_Gordon_(entertainment_manager)
Portable, artificial vision device
OrCam devices such as OrCam MyEye are portable, artificial vision devices that allow visually impaired people to understand text and identify objects
OrCam_device
1986 spy comedy film directed by Penny Marshall
accesses the consulate computer to secure an exit route for Jack but Talbot disables the device before she finishes. Terry visits Liz's home for advice but
Jumpin'_Jack_Flash_(film)
Mobile security risk
Juice jacking is a theoretical type of compromise of devices like smartphones and tablets which use the same cable for charging and data transfer, typically
Juice_jacking
Smartphones released by Apple in 2016
back camera, and the controversial removal of the 3.5 mm headphone jack. The device's internal hardware received upgrades, including a heterogeneous quad-core
IPhone_7
Bitcoin cryptocurrency hardware wallet product
mobile app, a hardware device, and a set of recovery tools in case the customer loses the phone, their hardware or both. Jack Dorsey announced in June
Bitkey
Programmable machine that processes data
robots. Computers are at the core of general-purpose devices such as personal computers and mobile devices, such as smartphones. Computers power the Internet
Computer
(2007–2025). iPhone News - Newsroom Archive. Retrieved September 19, 2025. Official Apple sites iPhone iOS Specifications Obsolete and vintage devices
List_of_iPhone_models
American YouTube personality, comedian, actor, and producer
Pierces Cable With HLN’s ‘Jack Vale: Offline’". Deadline, January 2015 Official "Pooter" website for his flatulence device "Jack Vale". Internet Movie Database
Jack_Vale_(comedian)
British television series
I, Jack Wright is a 2025 British drama television series created by Chris Lang and starring John Simm, Nikki Amuka-Bird, Daniel Rigby and Trevor Eve. The
I,_Jack_Wright
Electrical connector used for analog audio and video
Connections are made by pushing the cable's plug into the female jack on the device. The signal-carrying pin protrudes from the plug, and often comes
RCA_connector
Computer programming technique
Jensen's device is a computer programming technique that exploits call by name. It was devised by Danish computer scientist Jørn Jensen, who worked with
Jensen's_device
Android smartphone
and Jack Posobiec. It was marketed in particular to supporters of then-former U.S. President Donald Trump, with advertising promoting the device as a
Umidigi_A9
Mechanical lifting device operated by turning a leadscrew
A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderate and heavy weights, such as
Jackscrew
American author (born 1975)
George Petersen (born 3 July 1975), better known by his pen name Jack Carr, is an American novelist, screenwriter, producer, podcaster, and former Navy
Jack_Carr_(writer)
Device for removing boots
the user places the heel of the boot in the mouth of the jack, stands on the back of the device with the other foot, and pulls their foot free of the front
Boot_jack
Device for broadcasting radio signals
audio device (such as an MP3 player or a smartphone) to a standard FM radio. Most of these transmitters plug into the device's headphone jack and then
Personal_FM_transmitter
British television sitcom
Big Boys is a British television sitcom created and written by Jack Rooke, first broadcast on Channel 4 and available on All 4 from 26 May 2022. It stars
Big_Boys_(TV_series)
Portal device within the Stargate fictional universe
A Stargate is a fictional Einstein–Rosen bridge portal device within the Stargate fictional universe that allows practical, point-to-point near instantaneous
Stargate_(device)
Device used for lifting or lowering a load
A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated
Hoist_(device)
24-pin USB connector system
Mode, this mode allowed a device with a Type‑C port to drive analog headsets directly through an audio adapter with a 3.5 mm jack, providing three analog
USB-C
Operating system for mobile devices
open-source software, designed primarily for touchscreen-based mobile devices such as smartphones and tablet computers. Android has historically been
Android_(operating_system)
Branch of physics and electrical engineering
studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other electrically charged particles. It
Electronics
DC Comics superhero
before, but he owes them all to one device implanted in him rather than a chemical agent and two devices. When Jack Ryder first became the Creeper, he
Creeper_(DC_Comics)
Connectors for wiring of telephone equipment
the pinout of the device, i.e. the assignment or function of each contact. Modular connectors are specified for the registered jack (RJ) series of connectors
Telephone_jack_and_plug
Elastic object that stores mechanical energy
A spring is a device consisting of an elastic but largely rigid material (typically metal) bent or molded into a form (especially a coil) that can return
Spring_(device)
Fictional device appearing in American comic books
fictional device appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist Jack Kirby, the device first appeared
Cerebro
Financial services provided by Block, Inc.
Marks New Handheld POS Device and Release Schedule". Digital Transactions. Retrieved 2025-12-30. Mason, Emily (May 27, 2025). "Jack Dorsey's Block Plans
Square_(financial_services)
E-reader devices
The first Amazon Kindle e-reader device was introduced in November 2007. As of 2025, twelve generations of Kindle devices have been released, with the latest
Amazon_Kindle_devices
Topics referred to by the same term
terminator, separator or filler. This symbol has no visual representation. Null device, a virtual file that discards data written to it, on Unix systems /dev/null
Null
Action sport
skiing device with a bench seat attached to a ski. The seat may be solidly mounted with a post, or sprung mounted with a shock-absorbing device. The origins
Jack_jumping
American racing driver (1886–1950)
device, a transmission device, a clutch plate and a steering wheel invention. Wikimedia Commons has media related to Jack Tower. "Jack Tower". Jack Tower
Jack_Tower
2020 film by Chris Columbus
son Jack. Wanting to be back home where it is snowing, Kate secretly tries to fly back early to Boston. Unbeknownst to Kate and their stowaway Jack, the
The_Christmas_Chronicles_2
2025 disappearance in Canada
Canadian siblings Lilly Sullivan (born March 2019) and Jack Sullivan (born October 29, 2020) disappeared from their rural home on Gairloch Road in Lansdowne
Disappearance of Lilly and Jack Sullivan
Disappearance_of_Lilly_and_Jack_Sullivan
Method of espionage tradecraft
suspicion. Any hidden location is used. A dead drop spike is a concealment device similar to a microcache. It has been used since the late 1960s to hide money
Dead_drop
1987 science fiction comedy film directed by Joe Dante
contact by attaching another device to Jack's inner ear, enabling him to talk to Jack. Before the pod runs out of oxygen, Jack must help extract Tuck by
Innerspace
American witch house music group
music band from Traverse City, Michigan. It was founded by Heather Marlatt, Jack Donoghue and John Holland. Salem is considered one of the pioneers of the
Salem_(American_band)
Powered mechanical device
movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological
Machine
Fictional character from Doctor Who and Torchwood
Captain Jack Harkness is a fictional character played by John Barrowman in Doctor Who and its spin-off series, Torchwood. The character first appears in
Jack_Harkness
A wax jack (wax-jack, taper-jack) is a device used to hold a taper of sealing wax intended to create sealings on documents. The wax jack was first introduced
Wax_jack
Audio signal access point built into a mixing console
return jack interrupts the signal, but the send jack doesn't. The send jack can always be counted on to send a signal out to an external device. A refinement
Insert_(effects_processing)
2005 animated film
activates a device that erases her memory of the events. Bret Parker as Kari McKeen, the babysitter for Jack-Jack. Eli Fucile as Jack-Jack Parr, who, as
Jack-Jack_Attack
Type of electrical power connector
used to interface the secondary side of a power supply with the device. Some of these jacks contain a normally closed switch; the switch can disconnect internal
Coaxial_power_connector
Starlight. Lamplighter's powers seem to mostly emanate from his torch-like device, which he can use to fly and emanate blinding light or destructive fires
List_of_The_Boys_characters
Comic book superhero in the DC Comics
receiving Jack's mental commands from a distance (this is a feature of the device, an ability to "attune itself to the user", and not a power of Jack's). At
Starman_(Jack_Knight)
Physical components of a computer
storage, graphics card, sound card, and computer case. It includes external devices such as a monitor, mouse, keyboard, and speakers. By contrast, software
Computer_hardware
Software framework for audio
sound devices in a system. ALSA is released under GPL-2.0-or-later and LGPL-2.1-or-later. On Linux, sound servers, like sndio, PulseAudio, JACK (low-latency
Advanced Linux Sound Architecture
Advanced_Linux_Sound_Architecture
Device for tracking stolen vehicles
such as the radio, headlight switch, or other switched device. The core of the legacy LoJack system is a small, silent radio transceiver that is discreetly
LoJack
Windows Phone. New devices running Windows Mobile were released between 2003 and 2010. Many different companies produced devices running Windows Mobile
List of Windows Mobile devices
List_of_Windows_Mobile_devices
Vibrating and rotating phallic sex toy with a clitoral stimulator attached to the shaft
vaginal stimulation with a clitoral stimulator attached to the shaft. The device's name is derived from the fact that the clitoral stimulator looks like a
Rabbit_vibrator
Video game series
The series began with You Don't Know Jack (1995), and combines trivia and comedy within a game show framing device. While it is primarily a PC and Mac-based
You Don't Know Jack (franchise)
You_Don't_Know_Jack_(franchise)
Sony Xperia Android smartphone
adjusts based on light sensors on both the front and back of the device. The device supports Wi-Fi 7. One of the key improvements in the Xperia 1 VII
Sony_Xperia_1_VII
"headphone splitter" or "audio jack splitter", is a device that allows two headphones to be connected through to one audio jack. They can be used to listen
Dual_headphone_adapter
Digital media player by Nvidia
headphone jack is sold separately but is no longer available from official channels. The Shield runs Android TV; games optimized and ported for the device are
Nvidia_Shield_TV
2010 film
decades ago, Jack Kevorkian builds his first "Mercitron" from parts bought at a flea market. He meets with Rivlin and presents his device. Kevorkian explains
You_Don't_Know_Jack_(film)
Boundary of a private and public network
soon as possible upon entering the customer premises. A network interface device often serves as the demarcation point. Prior to Federal Communications Commission
Demarcation_point
2025 smartphone built from BlackBerry Classic hardware
than the original and is charged via a USB‑C port; the device also features a headphone jack, single nano‑SIM slot, NFC support, Bluetooth, Wi‑Fi and
Zinwa_Q25
Messaging and VoIP service owned by Meta
WhatsApp for linked devices to work, but now WhatsApp can run on linked devices without such requirement. This ability (named multi-device support) began testing
Licensing program for peripherals for iPod, iPad and iPhone
ultimately became MFi. The MFi program covers various device connectors including the headphone jack, original dock connector and the newer Lightning connector
MFi_Program
Sex toy that is designed to be inserted into the rectum
rectum for sexual pleasure. They often have a flanged end to prevent the device from being lost inside the rectum. Rectal dilators were originally designed
Butt_plug
Cell phone model
2008-01-27. PhoneDB. "Samsung SGH-i607 BlackJack - Device Specs - PhoneDB". phonedb.net. "Samsung SGH-i607 BlackJack reviews and technical details - Softpedia"
Samsung_BlackJack
Device which rotates meat roasting on a spit
roasting jacks included the steam jack, driven by steam, the smoke jack, driven by hot gas rising from the fire, and the bottle jack or clock jack, driven
Roasting_jack
American mobile virtual network operator
renders to a boxier aesthetics reminiscent of a Samsung Galaxy flagship device. Hendrickson and Thomas stated that the T1 Phone will run on a Qualcomm
Trump_Mobile
Type of telephone adapter
(ATA) or FXS gateway is a device for connecting traditional analog telephones, fax machines, and similar customer-premises devices to a digital telephone
Analog_telephone_adapter
Analog low-pass filter on communications networks
it to every jack in the home where an analog device will be in use, and dedicating the other (unfiltered) leg to the DSL modem. Some devices such as monitored
DSL_filter
Security-focused, Android-based mobile operating system
using the Auditor app, either with the help of a second device or by using remote attestation. Jack Wallen of ZDNET described the installation process as
GrapheneOS
American multinational technology company
returned to profitability by introducing the iMac, iPod, iPhone, and iPad devices; creating the iTunes Store; launching the "Think different" advertising
Apple_Inc.
1847 novel by Emily Brontë
another character. The use of a character like Nelly Dean is a literary device, a well-known convention taken from the Gothic novel, the function of which
Wuthering_Heights
Fantasy comedy TV series (2019–2026)
modern-day character, Anathema Device, distantly related to prophetess Agnes Nutter, wears a Victorian "witchy look." Actor Jack Whitehall, as would-be witch-hunter
Good_Omens_(TV_series)
2019 Android phablet by Samsung Electronics
connectivity, the only A9x device released under the first-generation of the relaunched Galaxy A lineup, and also the third Galaxy Ax0 device (after Galaxy A60
Samsung_Galaxy_A90_5G
Marvel Comics character
appearing in American comic books published by Marvel Comics. Created by Jack Kirby, the character first appeared in Devil Dinosaur #1 (April 1978). Devil
Devil_Dinosaur
E-book reading device or technology
is a series of e-readers designed and marketed by Amazon. Amazon Kindle devices enable users to browse, buy, download, and read e-books, newspapers, magazines
Amazon_Kindle
American author, journalist and social activist (1876–1916)
London (né Chaney; January 12, 1876 – November 22, 1916), better known as Jack London, was an American novelist, journalist and activist. A pioneer of commercial
Jack_London
Jack PC is a thin client device that is approximately the size of a network wall port. Its design allows for one's monitor, keyboard & mouse to plug straight
Jack_PC
Literary device in the form of a repeated joke or reference
A running gag, or running joke, is a literary device that takes the form of an amusing joke or a comical reference and appears repeatedly throughout a
Running_gag
JACK DEVICE
JACK DEVICE
Surname or Lastname
English
English : from an Old English personal name, Dæcca.Dutch : metonymic occupational name for a roofer, from dack, a variant of deck ‘roof’. Compare De decker.
Surname or Lastname
English and North German
English and North German : patronymic from Jack.
Surname or Lastname
Scottish and English
Scottish and English : from a Middle English personal name, Jakke, from Old French Jacques, the usual French form of Latin Jacobus, which is the source of both Jacob and James. As a family name in Britain, this is almost exclusively Scottish.English and Welsh : from the same personal name as 1, taken as a pet form of John.German (also Jäck) : from a short form of the personal name Jacob.Americanized form of one or more like-sounding Jewish surnames.
Male
Polish
Modern form of Polish Jacenty, JACEK means "hyacinth flower."
Boy/Male
American, Anglo, Australian, British, Celebrity, Chinese, Christian, Danish, Dutch, English, French, German, Hebrew, Indian, Jamaican, Latin, Polish, Swedish, Swiss, Tamil
God is Gracious; Son of Jack; He who Supplants; Diminutive of Jack; Supplanter
Surname or Lastname
English (Kentish)
English (Kentish) : from a medieval personal name, Pack, possibly a survival of the Old English personal name Pacca, although this is found only as a place name element and appears to have died out fairly early on in the Old English period. The Middle English personal name is more likely to be a derivative of the Latin Christian name Paschalis (see Pascal).Jewish (Ashkenazic) : metonymic occupational name for a wholesale trader, from German Pack ‘package’ (see Packer).Anglicized form of Dutch Pak.
Surname or Lastname
English
English : from Middle English bakke ‘back’ (Old English bæc), hence a nickname for someone with a hunched back or some other noticeable peculiarity of the back or spine, or a topographic name for someone who lived on a hill or ridge, or at the rear of a settlement.English : from the Old English personal name Bacca, which was still in use in the 12th century. It is of uncertain origin, but may have been a byname in the same sense as 1.English : nickname from Middle English bakke ‘bat’ (apparently of Scandinavian origin), from some fancied resemblance to the animal.Altered spelling of Bach 1, 2, or 6.North German : from Middle Low German back ‘kneading trough’, hence a metonymic occupational name for someone who made or used such vessels.Americanized spelling of Norwegian Bakk(e) (see Bakke).
Male
Finnish
Short form of Finnish Jaako, JAAK means "supplanter."
Male
English
Probably originally an Anglicized form of French Jacques, JACK means "supplanter," it is now considered a pet form of English John, meaning "God is gracious."
Male
English
Scottish form of English Jack, JOCK means "God is gracious."
Surname or Lastname
English (Cornwall and Wales)
English (Cornwall and Wales) : variant of Jack.Czech (JaÄka), Polish, and German (of Slavic origin) : from a pet form (Czech JaÄ, Polish Jacz) of any of the various Slavic personal names beginning with Ja-, for example Jakub, Jan, Jacenty (see Jacek).
Male
English
Originally a short form of surnames, mostly Scottish, beginning with Mac-, MACK means "son of," it is now sometimes given as a forename.Â
Boy/Male
Christian & English(British/American/Australian)
Godly
Boy/Male
Shakespearean American Hebrew Polish English
Henry VI, Part 2' Jack Cade, a rebel.
Surname or Lastname
English, German, and Jewish (Ashkenazic)
English, German, and Jewish (Ashkenazic) : metonymic occupational name for a maker of sacks or bags, from Old English sacc, Middle High German sack, German Sack ‘sack’. Bahlow also suggests someone who carried sacks.German : topographic from Middle High German sack ‘sack’, ‘end of a valley or area of cultivation’.Dutch : from a reduced form of the personal name Zacharias.Jewish (eastern Ashkenazic) : from an acronym of the Hebrew phrase Zera Keshodim ‘Seed of the Holy’ (referring to martyred ancestors), or from a short form of the personal name Isaac.
Girl/Female
Australian, Netherlands, Portuguese
Variant of Jack
Female
English
Pet form of English Jackalyn, JACKI means "supplanter."
Male
English
Short form of English Zackary, ZACK means "whom Jehovah remembered."Â
Boy/Male
American, Australian, British, English, French, German, Hebrew, Scottish, Swedish, Swiss
Son of Jack; He who Supplants; God has been Gracious; Has Shown Favor; Based on John or Jacques; God is Gracious
Female
Native American
Native American Tupi name JACI means "moon."
JACK DEVICE
JACK DEVICE
Girl/Female
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Telugu
Earth; Nature; Beautiful
Boy/Male
Hindu
Darling
Girl/Female
Indian, Sanskrit
Charming; Bold; Brave
Girl/Female
Hindu, Indian, Traditional
One who has an Army of Demons
Girl/Female
Muslim
Warm
Boy/Male
Arabic, Farsi, Iranian, Muslim, Parsi
Learned; Intelligent
Boy/Male
American, Christian, French, Greek, Gujarati, Hindu, Indian, Japanese, Kannada, Malayalam, Marathi, Telugu
Son of Fire; Light of Heaven
Girl/Female
British, English, Greek, Swedish
Pure
Boy/Male
Indian, Tamil
Originality
Boy/Male
Bengali, Gujarati, Hindu, Indian, Jain, Modern, Punjabi, Sanskrit, Sikh, Traditional
Winner; Victory; Win; Success; Victorious
JACK DEVICE
JACK DEVICE
JACK DEVICE
JACK DEVICE
JACK DEVICE
n.
A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
v. i.
To hunt game at night by means of a jack. See 2d Jack, n., 4, n.
n.
A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat.
n.
A machine or contrivance for turning a spit; a smoke jack, or kitchen jack.
n.
A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack.
v. t.
To put in a sack; to bag; as, to sack corn.
n.
A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack
n.
A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State.
adv.
In, to, or toward, the rear; as, to stand back; to step back.
n.
See Jack-with-a-lantern, under 2d Jack.
n.
To make a pack of; to arrange closely and securely in a pack; hence, to place and arrange compactly as in a pack; to press into close order or narrow compass; as to pack goods in a box; to pack fish.
a.
Being at the back or in the rear; distant; remote; as, the back door; back settlements.
v. t.
To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5.
n.
A pitcher or can of waxed leather; -- called also black jack.
v. i.
To make a back for; to furnish with a back; as, to back books.
v. i.
To write upon the back of; as, to back a letter; to indorse; as, to back a note or legal document.
n.
An envelope, or wrapping, of sheets used in hydropathic practice, called dry pack, wet pack, cold pack, etc., according to the method of treatment.
n.
see Ils Jack.
n.
A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; -- called also jack crosstree.
v. t.
To bear or carry in a sack upon the back or the shoulders.