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Definition of "jack" [jack]

  • Informal A man; a fellow. (noun)
  • One who does odd or heavy jobs; a laborer. (noun)
  • One who works in a specified manual trade. Often used in combination: a lumberjack; a steeplejack. (noun)
  • A sailor; a tar. (noun)
  • Games A playing card showing the figure of a servant or soldier and ranking below a queen. Also called knave. (noun)
  • A man or fellow (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • A sailor (noun)
  • The male of certain animals, esp of the ass or donkey (noun)
  • A mechanical or hydraulic device for exerting a large force, esp to raise a heavy weight such as a motor vehicle (noun)
  • Any of several mechanical devices that replace manpower, such as a contrivance for rotating meat on a spit (noun)
  • One of four playing cards in a pack, one for each suit, bearing the picture of a young prince; knave (noun)
  • A small usually white bowl at which the players aim with their own bowls (noun)
  • A female socket with two or more terminals designed to receive a male plug (jack plug) that either makes or breaks the circuit or circuits (noun)
  • A flag, esp a small flag flown at the bow of a ship indicating the ship's nationality (noun)
  • Either of a pair of crosstrees at the head of a topgallant mast used as standoffs for the royal shrouds (noun)
  • A part of the action of a harpsichord, consisting of a fork-shaped device on the end of a pivoted lever on which a plectrum is mounted (noun)
  • Any of various tropical and subtropical carangid fishes, esp those of the genus Caranx, such as C. hippos (crevalle jack) (noun)
  • One of the pieces used in the game of jacks (noun)
  • To lift or push (an object) with a jack (verb)
  • To connect (an electronic device) with another by means of a jack and a jack plug (verb)
  • To hunt (fish or game) by seeking them out or dazzling them with a flashlight (verb)

www.Collinsdictionary.com (c) HarperCollins Publishers Ltd 2016

Use "jack" in a sentence
  • "The portions of the operator's talking circuit that are located permanently in the switchboard cabinet are in such cases terminated in a jack, called an operator's _cut-in jack_."
  • "Bellinger recommends choosing one topic to focus on -- "the expression 'jack of all trades, master of none' holds true especially in the Web 2.0 world" -- and working on engaging with the top people in that area rather than trying to tackle all the world's problems at once."
  • ""You cannot become an expert if one day you work in maternity, the other day you work in the long-term care, and then you are in emergency room," she said, referencing the phrase "jack of all trades, master of none.""