Definition of Jack

1. Noun. A small worthless amount. "You don't know jack"

2. Verb. Lift with a special device. "Jack up the car so you can change the tire"
Exact synonyms: Jack Up
Generic synonyms: Bring Up, Elevate, Get Up, Lift, Raise

3. Noun. A man who serves as a sailor.

4. Verb. Hunt with a jacklight. "In the summer they like to go out and jack"
Exact synonyms: Jacklight
Generic synonyms: Hunt, Hunt Down, Run, Track Down

5. Noun. Someone who works with their hands; someone engaged in manual labor.

6. Noun. Immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted.
Exact synonyms: Jackfruit, Jak
Generic synonyms: Edible Fruit
Group relationships: Artocarpus Heterophyllus, Jackfruit, Jackfruit Tree

7. Noun. A small ball at which players aim in lawn bowling.
Group relationships: Bowls, Lawn Bowling
Generic synonyms: Ball

8. Noun. An electrical device consisting of a connector socket designed for the insertion of a plug.
Generic synonyms: Electrical Device
Specialized synonyms: Phone Jack, Telephone Jack

9. Noun. Game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks.
Exact synonyms: Jackstones
Generic synonyms: Game Equipment

10. Noun. Small flag indicating a ship's nationality.
Generic synonyms: Flag

11. Noun. One of four face cards in a deck bearing a picture of a young prince.
Exact synonyms: Knave
Generic synonyms: Court Card, Face Card, Picture Card

12. Noun. Tool for exerting pressure or lifting.
Specialized synonyms: Bumper Jack, Jackscrew, Screw Jack
Generic synonyms: Tool

13. Noun. Any of several fast-swimming predacious fishes of tropical to warm temperate seas.

14. Noun. Male donkey.
Exact synonyms: Jackass
Generic synonyms: Ass

Definition of Jack


2. n. A familiar nickname of, or substitute for, John.

3. n. A coarse and cheap mediæval coat of defense, esp. one made of leather.

4. n. A pitcher or can of waxed leather; -- called also black jack.

5. v. i. To hunt game at night by means of a jack. See 2d Jack, n., 4, n.

6. v. t. To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5.

Definition of Jack

1. Proper noun. (given name male ), also used as a pet form of John. ¹

2. Proper noun. (informal) A sailor. ¹

3. Proper noun. (informal archaic) a soldier ¹

4. Noun. (slang) Jack Daniel's, a brand of American whiskey. ¹

5. Noun. A mechanical device used to raise and (temporarily) support a heavy object. ¹

6. Noun. A man or men in general. ¹

7. Noun. A male animal. ¹

8. Noun. (card games) The card ranking between the (term ten) and (term queen) of any suit, picturing a knave or prince on its face. In some card games has a value of eleven based on its rank, but in many card games has a value of ten like the ''ten'', ''queen'', and (term king) cards. Also called a ''knave''. ¹

9. Noun. (archaic) A knave (a servant or later, a deceitful man). ¹

10. Noun. (zoology) A male ass. ¹

11. Noun. A surface-mounted connector for electrical, especially telecommunications, equipment. ¹

12. Noun. (sports) A target ball in bowls, etc; a jack-ball. ¹

13. Noun. (games) A small, six-pointed playing piece used in the game of jacks. ¹

14. Noun. (colloquial) Nothing, jackshit. ¹

15. Noun. (nautical) A small flag at the bow of a ship. ¹

16. Noun. (nautical) A naval ensign flag flown from the main mast, mizzen mast, or the aft-most major mast of (especially) British sailing warships; Union Jack. ¹

17. Noun. (military) A coarse and cheap medieval coat of defense, especially one made of leather. ¹

18. Noun. (two-up) A penny with a head on both sides, used for cheating. (Reference: Sidney J. Baker, ''The Australian Language'', second edition, 1966, chapter XI section 3, page 243.) ¹

19. Noun. (slang) Money. ¹

20. Noun. (slang Appalachians) A smooth often ovoid large gravel or small cobble in a natural water course. ¹

21. Noun. A common name for the freshwater pike, green pike or pickerel. ¹

22. Noun. Large California rockfish. ¹

23. Noun. An order of marine fish in the ''Carangidae'' family. ¹

24. Noun. (obsolete nautical) A sailor; a "jack tar". ¹

25. Verb. (transitive) To use a jack. ¹

26. Verb. (transitive) To raise or increase. ¹

27. Verb. (transitive colloquial) To steal something, typically an automobile. Contraction of carjacking ¹

28. Verb. (transitive slang baseball) To hit (the ball) hard; especially, to hit (the ball) out of the field, producing a home run. ¹

¹ Source:

Definition of Jack

1. to raise with a type of lever [v -ED, -ING, -S]

Medical Definition of Jack

1. Young salmon, usually a male, that matures precociously. (12 Jan 1998)

Jack Pictures


Lexicographical Neighbors of Jack


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