UK:*UK and possibly other pronunciationsUK and possibly other pronunciations'jack', 'Jack': /ˈdʒæk/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/dʒæk/ ,USA pronunciation: respelling( jak)
any of various portable devices for raising or lifting heavy objects short heights, using various mechanical, pneumatic, or hydraulic methods.
GamesAlso called knave.[Cards.]a playing card bearing the picture of a soldier or servant.
Electricitya connecting device in an electrical circuit designed for the insertion of a plug.
Informal Terms(cap.) fellow; buddy; man (usually used in addressing a stranger):Hey, Jack, which way to Jersey?
GamesAlso called jackstone.
one of a set of small metal objects having six prongs, used in the game of jacks.
one of any other set of objects, as pebbles, stones, etc., used in the game of jacks.
jacks, (used with a sing. v.) a children's game in which small metal objects, stones, pebbles, or the like, are tossed, caught, and moved on the ground in a number of prescribed ways, usually while bouncing a rubber ball.
Fishany of several carangid fishes, esp. of the genus Caranx, as C. hippos(crevalle jack or jack crevalle), of the western Atlantic Ocean.
Slang Termsmoney:He won a lot of jack at the races.
Naval Termsa small flag flown at the jack staff of a ship, bearing a distinctive design usually symbolizing the nationality of the vessel.
Naval TermsAlso called jack crosstree. either of a pair of crosstrees at the head of a topgallant mast, used to hold royal shrouds away from the mast.
Naval Terms(cap.) a sailor.
MammalsSee jack rabbit.
a device for turning a spit.
a small wooden rod in the mechanism of a harpsichord, spinet, or virginal that rises when the key is depressed and causes the attached plectrum to strike the string.
Sport[Lawn Bowling.]a small, usually white bowl or ball used as a mark for the bowlers to aim at.
TimeAlso called clock jack.[Horol.]a mechanical figure that strikes a clock bell.
Fisha premigratory young male salmon.
Show Business[Theat.]See brace jack.
Sport[Falconry.]the male of a kestrel, hobby, or esp. of a merlin.
Idiomsevery man jack, everyone without exception:They presented a formidable opposition, every man jack of them.
to lift or move (something) with or as if with a jack (usually fol. by up):to jack a car up to change a flat tire.
Informal Termsto increase, raise, or accelerate (prices, wages, speed, etc.) (usually fol. by up).
Informal Termsto boost the morale of; encourage (usually fol. by up).
Slang Termsjack off,Slang (vulgar). to masturbate.
Building[Carpentry.]having a height or length less than that of most of the others in a structure; cripple:jack rafter; jack truss.
1350–1400; Middle English jakke, Jakke used in addressing any male, esp. a social inferior, variant of Jakken, variant of Jankin, equivalent. to JanJohn + -kin -kin; extended in sense to anything male, and as a designation for a variety of inanimate objects
jack2( jak),USA pronunciationn.
jack3( jak),USA pronunciationn.
a defensive coat, usually of leather, worn in medieval times by foot soldiers and others.
a container for liquor, originally of waxed leather coated with tar.
Middle French jaque(s), jacket, short, plain upper garment, probably after jacques peasant (see Jacquerie)