adv (1)倒下(downwards;from an upright position)：fall/tumble/topple～跌倒/跌倒/倾覆;knock sb/sth～把某人或某物打(撞)倒;
 (2)从一边到另一边(from one side to another side)：turn the page～翻过这一页;The boat rolled right～and sank.那只船倾覆之后沉没了。The nurse turned the old man～on to his front and gave him an injection in the left buttock. 护士给那老人翻身让他俯卧，在他的左臀部注射了一针。He leaned the airplane～onto its back.他驾驶着飞机翻转，背朝下地飞行。
 (3)穿(横)过(across)：He came～and spoke to us.他走过来跟我们谈话。We went/rowed～to the island in a small boat.我们乘/划一只小船到那岛上去。Take/Put this～there.把这个带/放到那边去。ask sb～请某人过来;
 (4)再，又(again)(尤AmE)：This work will have to be done～.这活儿得返工。He then told/repeated the story～again.于是他把故事又讲了/重复一遍。
 (5)剩余，余下(remaining)：Twelve will go once in fourteen，and leave two～.14除以12得1余2。There are twelve here，and we need four，so we have eight～.这里有12个，我们需要4个，因而可剩下8个。We've sold 48 balls and we have 2 left～.我们已经卖出48个球，还剩两个。
 (6)加上;……多(in addition;more)：two hours or～：两个小时或多一点;two metres and (a little)～两米多(一点);This story book is for boys and girls of ten and～.这本故事书是供10岁和10岁以上儿童阅读的。
 (7)结束，完结(finished)：His astonishment was a little～.他的惊讶消失了一点。Your troubles/relationship will soon pass～.你的苦脑/你们的关系将很快结束。Do get it～quickly.一定要赶快把它完结。
 (8)(表示)转移或更换(used to express transfer or change from one person，group，place， etc to another)：go～to the enemy 变节投敌;He willed/signed the house～to his son.他在遗嘱中言明/签字把房子转给他儿子。She handed～the letter to her sister.她将信交给她的妹妹。
 (9)全部覆(遮)盖(so as to cover (sb/sth) entirely)：That street has been asphalted～.那条大街已铺上了沥青路面。Those wounds will soon heal～.那些伤口会很快愈合。The river froze～.这条河全结冰了。Cover her～with a sheet.用床单把她盖起来。paint sth～in red把某物漆成红色;
 over against 与某事物对比(fml)：set truth～against falsehood 使真理和谬误成鲜明对照;
 over and over (again) 一再，反复多次： The children sang the song～and～again.孩子们反复地唱这首歌。
 prep(1)覆(盖)于……之上(on the surface of and partly or completely covering (sb/sth))：spread a blanket/cloth～the bed/the table. 把毯子/台布铺在床/桌上; He wore galoshes～his shoes.他在鞋外面穿着套靴。He came in with his hat pulled down～his eyes.他走进来，帽子戴得很低，几乎遮住了眼睛。
 (2)在或向……的上方(但不接触)(in or to a position above the top of (sb/sth))：It's hard to cook～a campfire.在篝火上烧饭不是件容易事。A big cliff hung～us.巨大的峭壁悬在我们上方。The upper story projects～the street. 楼房的上一层突出在街道上方。
 (3)横越(from one side to the other;across)：The storm went～us.暴风从我们头上掠过。Luckily all the stones passed～our heads.幸而石块都越过我们的头顶，落到那边去了。He escaped～the frontier.他越过边境逃走了。
 (4)在……远端或对面(on the far or opposite side of)：at a wedding～the herring pond 在北大西洋彼岸举行的婚礼上;our neighbours～the way/the road 我们那些住在路对面的邻居;Her house is～that river/that street.她的家在河/街的那边。The sun disappeared～the horizon.太阳消失在地平线那边。
 (5)越过……(到另一边)(so as to cross(sth)and be on the other side)：jump～a ditch/a stream 跳过一条沟/溪;climb～a wall/a mountain 爬过一堵墙/座山;walk～a bridge过桥;He spoke to her～his shoulder.他转过头来跟她说话。
 (6)遍布……;在……的处((found，thrown，etc) aross (an area))(尤与all连用)：The rumour is all～Washington.这一谣言传遍了华盛顿。The broken bottles lay all～the floor.地板上到处都是碎瓶子。They traveled all～the country/world.他们周游全国/世界。
 (7)多于，超过(时间、数量、价格等)(more than(a specified time，amount，cost，etc))：It takes～an hour to drive there.开车到那里需要一个多小时。O～a thousand people were present.出席的有1000多人。His new car has cost him a little～$10，000.他的新车花费了他一万多美元。
 (8)(表示控制、掌握、权威、优越等)(used to express control，command，authority，superiority，etc)：This court has no jurisdiction～the property in America.本法院对在美国的财产无裁判权。He reigns～a great empire.他统治一个大帝国。I am not in charge of the department，I have two people～me.我不是这个部门的主管人，我还有两位上司。They don't appear to have got～their disappointment.看来他们还没有克服失望的心情。
 (9)在……期间，贯穿于……期间，直到……过后(during;throughout(a period))：The war extended～30 years.那场战争持续了30多年。They stationed in an isolated post～winter.他们在一个孤零零的哨所里驻守了整整一个冬天。They invited us to stay～Sunday.他们请我们过了星期日再走。He had flu～Christmas.他在圣诞节期间患了流感。fall asleep～a book/one's work 看着书/干着活睡着了;They discussed a matter～dinner.他们一边吃饭一边讨论问题。
 (10)因为;关于(because of or concerning(sth))：quarrel/fight/argue～sth 为(某事)而争论/斗争/辩论;brood～one's trouble 因烦恼事而心情沮丧;an argument～methods 关于方法问题的争论;rights～the canal 有关该运河的各种权利;
 (11)通过……传送(transmitted by(sth))：hear one another～the air 彼此用无线电通讯;speak to sb～the telephone 用电话和某人讲话;I heard it～the radio.我从无线电广播中听到这消息。give several recitals～the network 通过广播网举行了几场演奏会;
 over and above 此(另)外：He earns a large amount～and above his salary.他除了薪金之外，还有很大一笔收入。
 【辨异】1)over 与on、above 和beyond的区别见ABOVE;2)over与across和through的区别见ACROSS。