1. (n.)jack any of various portabledevices for raising or lifting heavy objects short heights, using various mechanical, pneumatic, or hydraulic methods: an automobile jack.
2. jack a connecting device in an electrical circuit designed for the insertion of a plug: a telephone jack.
3. jack (cap.) Informal. fellow; buddy; man (usu. used in addressing a stranger).
4. jack one of a set of small, six-pointed metal objects or pebbles used in the game of jacks.
5. jack jacks, (used with a sing. v.) a children's game in which these objects are tossed and gathered, usu. whilebouncing a rubberball.
6. jack any of several carangid fishes, esp. of the genusCaranx.
1. (noun)jack a playing card with a picture of a prince the jack of clubs
Definition of 'JACK'
Webster Dictionary
1. (noun)JACK a large tree, the Artocarpus integrifolia, common in the East Indies, closely allied to the breadfruit, from which it differs in having its leaves entire. The fruit is of great size, weighing from thirty to forty pounds, and through its soft fibrous matter are scattered the seeds, which are roasted and eaten. The wood is of a yellow color, fine grain, and rather heavy, and is much used in cabinetwork. It is also used for dyeing a brilliant yellow
2. (noun)JACK a familiar nickname of, or substitute for, John
3. (noun)JACK an impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic
4. (noun)JACK a popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat
5. (noun)JACK 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
33. (verb)JACK to move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5
Definitions of 'JACK'
The Nuttall Encyclopedia
1. JACK a familiar form of John, the most widely spread of Christian names, and said to be derived from the FrenchJacques or, as others maintain, from Jankin, a distinctive form of Johan or John; Johnkin gives us Jock and Jockey; from its extreme commonness it has acquired that slightly contemptuous signification observable in such compounds as "every man Jack," "Jack-of-all-trades," "Jack-an-apes," and the name as applied to the knaves in playing-cards, and to the small white ball used as a mark in the game of bowls is an example of its transferred sense.