definition of
Jack

[1] #1 Jack v. [jack, jack up] lift with a special device; "jack up the car so you can change the tire". wn

[2] #2 Jack n. [jack, doodly-squat, diddly-squat, diddlysquat, diddly-shit, diddlyshit, diddly, diddley, squat, shit] a small worthless amount; "you don't know jack". wn

[3] #3 Jack v. [jacklight, jack] hunt with a jacklight. wn

[4] #4 Jack n. [mariner, seaman, tar, Jack-tar, old salt, seafarer, gob, sea dog] a man who serves as a sailor. wn

[5] #5 Jack n. [laborer, manual laborer, labourer, jack] someone who works with their hands; someone engaged in manual labor. wn