jack meaning and definition

JACK noun

Definition of jack (noun)

1. a small worthless amount
   • "you don't know jack"
   • synonyms: diddley, diddly, diddlyshit, diddly-shit, diddlysquat, diddly-squat, doodly-squat, shit, squat
2. a man who serves as a sailor
   • synonyms: gob, Jack-tar, mariner, old salt, sea dog, seafarer, seaman, tar
3. someone who works with their hands; someone engaged in manual labor
   • synonyms: laborer, labourer, manual laborer
4. immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted
   • synonyms: jackfruit, jak
5. a small ball at which players aim in lawn bowling
6. an electrical device consisting of a connector socket designed for the insertion of a plug
7. 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
   • synonyms: jackstones
8. small flag indicating a ship's nationality
9. one of four face cards in a deck bearing a picture of a young prince
   • synonyms: knave
10. tool for exerting pressure or lifting
11. any of several fast-swimming predacious fishes of tropical to warm temperate seas
12. male donkey
    • synonyms: jackass

JACK verb

Definition of jack (verb)

1. lift with a special device
   • "jack up the car so you can change the tire"
   • synonyms: jack up
2. hunt with a jacklight
   • synonyms: jacklight