jack

Definitions

General English

Aviation

  • noun a powered device to move heavy components, such as control surfaces of large aircraft

Cars & Driving

  • noun a mechanical or hydraulic device for raising (part of) a car

Computing

  • noun a plug which consists of a single pin

Construction

  • A portable mechanism for moving loads short distances by means of force applied with a lever, screw, hydraulic press, or air pressure, as in applyingthe prestressing force to the tendons, or making small adjustments in the elevations of forms or form support, as in lift slab or slipform operations.
  • In electricity, a female connecting device or socket to which circuit wires are attached and into which a plug may be inserted (as on a telephone switchboard).

Electronics

  • An electric connector with one or more recessed openings, into which a plug with matching pins or prongs is inserted. When said plug is inserted, the circuit is closed. This allows for an easy and rapid connection which is secure. Widely used in communications, computer, and entertainment devices, equipment, and systems. Also called jack connector.

Media Studies

  • noun a female socket designed to receive a jack plug in order to complete a circuit

Military

  • noun a machine which is used to raise a vehicle or other heavy object a short distance off the ground

Slang

  • adjective fed up, tired, weary. To be jack of something or someone has been heard in Australian speech since the early years of the 20th century. It is probably not directly related to the more recent near synonym jacked off.
  • noun meths (methylated spirits) as drunk by tramps, dossers, etc.
  • noun money. A common term in the USA which is also heard in Britain and Australia.
  • noun the anus or buttocks. A rarer euphemism than jacksie, typically used in provincial working-class speech.
  • noun venereal disease. In this sense the word is common in Australia, although it is also heard in Britain. The origin of this usage is either in archaic rhyming slang, ‘jack in the box’: pox, or from the archaic use of jack to mean the penis or semen.
  • noun on one’s Jack/Jack Jones, rhyming slang for alone
  • verb to steal, rob, mug or hold up. The term, which became widespread in black street-gang jargon in the late 1980s, was probably a shortening of car-jack (itself modelled on hi-jack), describing armed holdups carried out on passing vehicles, a criminal fashion of the time.
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