jack1 /dʒæk/ noun [countableC] 1 TZa piece of equipment used to lift a heavy weight off the ground, such as a car, and support it while it is in the air 起重器,千斤顶 2 DGCa card used in card games that has a man’s picture on it and is worth less than a queen and more than a ten 〔纸牌的〕J 牌,杰克jack of hearts/clubs etc 红桃杰克/梅花杰克等
4 b) DGa small metal or plastic object that has six points, used in this game 〔抛接子游戏中用的〕带有六个尖端的金属[塑料]小物件 5. DSOa small white ball at which players aim larger balls in the game of bowls 〔滚木球运动中的〕靶子球 6 jack (shit) American EnglishAmE spoken not politeNONE/NOTHING a rude expression meaning anything at all 一点都不He doesn’t know jack shit about cars. 他对汽车一窍不通。
jack (shit)• And there was a further twenty second time penalty for leaving a jack out of place.• It doesn't look like they did jack shit.• On the final end he moved the jack again to add another and finish 20-17 ahead.• Henry turned to her and held up the jack.• Money for plaintiffs' lawyers and court costs will jack the total up to some $ 550m. → jumping jack, Union Jack