词典释义：
a device for lifting heavy objects, especially one for raising the axle of a motor vehicle off the ground so that a wheel can be changed or the underside inspected
起重器，千斤顶。
a playing card bearing a representation of a soldier, page, or knave, normally ranking next below a queen
纸牌中的 “J”牌。
(亦作
插座，插孔。
a small white ball in bowls, at which the players aim
（草地滚木球戏中作靶子球的）小白球。
(亦作
（抛接子游戏中用的）圆形的小鹅卵石（或星状的铁片或塑料片）。
(
抛接子游戏。
(
普通人，男人
-
he had that world-weary look of the working Jack who'd seen everything .他带着历尽沧桑的劳动者厌倦一切的神情。[ORIGIN: familiar form of the given name <Italic>John</Italic>.]
〈非正式，主美〉 ［用 作对陌生人的一种称呼］ 老兄。
〈北 美，非正式〉 伐木工人。
〈非正式〉 侦探；警察。
〈古〉 高空作业工人。
the figure of a man striking the bell on a clock
（时钟上）敲钟的人像。
a small version of a national flag flown at the bow of a vessel in harbour to indicate its nationality
船首旗（港口内船只上飘在船首的用于表示国籍的小旗）。
[mass noun]
〈美，非正式〉 钱。
a device for turning a spit
烤肉炙叉旋转器。
a part of the mechanism in a spinet or harpsichord that connects a key to its corresponding string and causes the string to be plucked when the key is pressed down.
琴键拨子。
a marine fish that is typically laterally compressed with a row of large spiky scales along each side. Jacks are important in many places as food or game fish
鲹（一种海鱼，鱼身两侧扁平，各有一排多棘大鳞片，是许多国家常见的食用与可供捕捉的鱼）。亦称<Bold>POMPANO</Bold>, <Bold>SCAD</Bold>.[originally a West Indian term.]
the male of various animals, especially a merlin or (US) an ass
雄性动物（尤指公灰背隼或〈美〉 公驴）。
used in names of animals that are smaller than similar kinds, e.g.
［用 在比同类动物矮小的动物名称里，如<Bold>jack snipe</Bold>］.
〈美， 非正式〉 <Bold>JACKSHIT</Bold>的简称。
another term for
同<Bold>BLACKJACK</Bold> （义项5）.
a sleeveless padded tunic worn by foot soldiers
（步兵穿的）无袖束腰棉外衣。[late Middle English: from Old French <Italic>jaque</Italic>; origin uncertain, perhaps based on Arabic.]
〈澳／新西兰〉 厌倦，厌烦
-
people are getting jack of strikes .人们逐渐开始厌烦罢工。
〈北美，非正式〉 非法获取；偷窃
-
what's wrong is to jack somebody's lyrics and not acknowledge the fact .错就错在剽窃了别人的歌词还不肯承认事实。
rob (someone)
抢劫。
-
before one can say Jack Robinson informal very quickly or suddenly 〈非正式〉 说时迟那时快，突然间，一刹那 -
every man jack informal each and every person （used for emphasis） 〈非正式〉 人人，每个人 ［用 于强调］they're spies ,every man jack of them . 他们是间谍，每个人都是 -
I'm all right ,Jack informal used to express selfish complacency. 〈非正式〉 （表示满足于自己没事的自私心理）老兄，我没事 -
jack of all trades （and master of none ） a person who can do many different types of work but who is not necessarily very competent at any of them 杂而不精的人，三脚猫；万能博士，万金油 -
on one's jack （或Jack Jones ）Brit .rhyming slang on one's own 〈英，谐俚〉 独自，自个儿
-
jack someone around N .Amer .informal cause someone inconvenience or problems, especially by acting unfairly or indecisively 〈北美，非正式〉 （尤指不公正或优柔寡断的行为）造成（某人）的不便，给（某人）带来麻烦 -
jack in （或into ）informal log into or connect up （a computer or electronic device） 〈非正式〉 进入或连接（电脑系统或电子装置） -
jack something in Brit .informal give up or leave off from doing something, especially a job〈英，非正式〉 放弃（或停止）做某事（尤指工作） -
jack off vulgar slang masturbate 〈粗俚〉 手淫 -
jack up 1 informal inject oneself with a narcotic drug 〈非正式〉 给自己注射麻醉毒品 -
2 Austral . give up or refuse to participate in something 〈澳〉 放弃；拒绝参与 -
jack something up 1 raise something, especially a vehicle, with a jack （用千斤顶）举起，抬起某物（尤指车辆） -
informal increase something by a considerable amount 〈非正式〉 （显著地）提高或增加France jacked up its key bank interest rate . 法国提高了主要的银行利率 -
２ NZ informal arrange or organize something 〈新西兰，非正式〉 安排，组织
"late Middle English： from
