• male donkey
• any of several fast-swimming predacious fishes of tropical to warm-temperate seas
• tool for exerting pressure or lifting
• one of four face cards in a deck bearing a picture of a young prince
• small flag indicating a ship''s nationality
• game equipment consisting of one of several small objects picked up while bouncing a ball in the game of Jacks
• an electrical device consisting of a connector socket designed for the insertion of a plug
• immense East Indian fruit resembling breadfruit of; its seeds are commonly roasted
• someone who works with their hands; someone engaged in manual labor
• a man who serves as a sailor
• a small worthless amount; "you don''t know Jack"
• hunt with a Jacklight
• lift with a special device; "Jack up the car so you can change the tire"

'Jack' in other languages