1. (

• jack ,
• doodly-squat ,
• diddly-squat ,
• diddlysquat ,
• diddly-shit ,
• diddlyshit ,
• diddly ,
• diddley ,
• squat ,
• shit

) a small worthless amount; "you don't know jack" ;

2. (

• mariner ,
• seaman ,
• tar ,
• Jack-tar ,
• Jack ,
• old_salt ,
• seafarer ,
• gob ,
• sea_dog

) a man who serves as a sailor ;

3. (

• laborer ,
• manual_laborer ,
• labourer ,
• jack ,

) someone who works with their hands; someone engaged in manual labor ;

4. (

• jackfruit ,
• jak ,
• jack

) immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted ;

5. (

• jack ,

) a small ball at which players aim in lawn bowling ;

6. (

• jack ,

) an electrical device consisting of a connector socket designed for the insertion of a plug ;

7. (

• jack ,
• jackstones

) 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 ;

8. (

• jack ,

) small flag indicating a ship's nationality ;

9. (

• jack ,
• knave

) one of four face cards in a deck bearing a picture of a young prince ;

10. (

• jack

) tool for exerting pressure or lifting ;

11. (

• jack

) any of several fast-swimming predacious fishes of tropical to warm temperate seas ;

12. (

• jack ,
• jackass

) male donkey ;

1. (

• jack ,
• jack_up

) lift with a special device; "jack up the car so you can change the tire" ;

2. (

• jacklight ,
• jack

) hunt with a jacklight ;