S: (n) jackfruit, jak, jack (immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted)
S: (n) jack (a small ball at which players aim in lawn bowling)
S: (n) jack (an electrical device consisting of a connector socket designed for the insertion of a plug)
S: (n) 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)
S: (n) jack (small flag indicating a ship's nationality)
S: (n) jack, knave (one of four face cards in a deck bearing a picture of a young prince)
S: (n) jack (tool for exerting pressure or lifting)
S: (n) jack (any of several fast-swimming predacious fishes of tropical to warm temperate seas)