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【词性】：n．

【释义】：

❶ 背，脊背，背部❷ 脊梁〔He broke his back falling down the stairs．他从楼梯掉下来，折断了脊梁骨。

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❸ 椅背，靠背❹ 后部〔the back of the cupboard碗橱的后部；the back of his leg他的腿的后部〕
❺ 背面，反面〔the back of the hand手背；the back of a rug小块地毯的反面(背面)〕
❻ (足球运动中)后卫(球员或位置)‖ adj．❶ 后部的〔the back wheel of a bicycle自行车的后轮〕
❷ 过去的，过时的，拖欠的〔a back copy of a newspaper一份过时的报纸；back pay拖欠的工资〕
❸ 相反的，反方向的〔the hack stroke of a piston活塞的后力〕
❹ 离开闹市的〔a back street偏僻的街巷〕‖ adv．❶ 在后部，向后部〔Please move back in the bus．上汽车后请往后面走。〕
❷ 返回〔I threw the ball to him and he threw it back．我把球扔给他，他又把球扔给我。〕
❸ 恢复(以前的状态)〔We nursed him back to health．我们把他调养得又恢复了健康。〕
❹ 归还〔Give back the money you borrowed．把你借的钱还回来。

〕‖ v．❶ 向后方移动，倒是〔The truck backed up to the platform．卡车倒著上了平台〕
❷ 支持〔The plan can’t fail if we all back it．如果我们大家都支持这个计划，它不会失败。〕
❸ 放到后面〔The rug is backed with rubber．这块小地毯的背后有一层橡胶。

〕／back and farth前后(左右)地／bach down放弃，取消(已开始的工作、声明等)，打退堂鼓。／back out，go back on［俚］失信，失言／behind one’s back背著某人／in back of在…的后部