/let; lɛt/
v (-tt-, pt, pp let)
1 [Cn.i no passive 不用于被动语态] (often with the infinitive omitted when the context is clear 连用的动词不定式在上下文清楚时常省略) allow (sb/sth) to 允许, 让（某人[某事物]）...
*Don't let your child play with matches. 别让孩子玩火柴.
* My father's only just had his operation and they won't let me see him yet. 我父亲刚动过手术, 医生还不允许我去看他.
* She asked me if she could leave but I wouldn't let her (leave). 她问我她是否可以走, 可我不让她走.
2 [Tn.pr, Tn.p] allow (sb/oneself/sth) to go or pass in, etc 允许（某人[自己/某事物]）进入, 通过
*let sb into the house 允许某人进屋
* I'll give you a key to the flat so that you can let yourself in. 我把房门钥匙交给你, 你可以自己进去.
* You've let all the air out of the tyres. 你让车胎的气都跑光了.
* Let her past (you). 让她（从你身旁）过去吧.
* Don't let the dog out (of the room). 别让狗跑到（房间）外面去.
* The roof lets water through. 屋顶漏雨.
* Windows let in light and air. 窗户可透光及通风.
3 [Cn.i no passive 不用于被动语态] (used as an imperative 用于祈使语气)
(a) (with the first person plural to make a suggestion 与复数第一人称连用, 用以提出建议)
*Let's go to the cinema. 咱们看电影去吧.
* I don't think we'll succeed but let's try anyway. 我想我们不一定能成功, 但是不管怎样还是试试吧.
(b) (in requests and commands 用于要求与命令)
*Let the work be done immediately. 工作要马上完成.
* Let there be no mistake about it, ie Don't misunderstand me. 不要误解我的意思.
(c) (used to express an assumption, eg in mathematics 用以表示假设, 如于数学中)
*Let line AB be equal to line CD. 设AB线与CD线等长.
* Let ABC be an angle of 90. 设ABC为一90角.
(d) (used to express defiance 用以表示违抗或蔑视)
*Let them do their worst. 让他们蛮干好啦.
* Let them attack
*we'll defeat them anyway. 让他们进攻吧, 反正我们必胜.
4 [Tn, Tn.pr, Tn.p] ~ sth (out/off) (to sb) allow sb to use (a house, room, etc) in return for regular payments 出租（房子、房间等）
*I let (out) my spare rooms (to lodgers). 我把多余的房间出租（给房客）.
* They decided to let (off) the smaller flats at lower rents. 他们决定把小单元廉价出租.
5 (idm 习语) ,let sb/sth `be not disturb or interfere with sb/sth 不打扰或不干涉某人[某事物]
*Let me be, I want a rest. 别打扰我, 我要休息.
* Let the poor dog be, ie Don't tease it. 别逗那条可怜的狗吧. let it `go (at `that) say or do no more about sth 不再多说; 不再多做; 就那样吧
*I don't agree with all you say, but I'll let it go at that. 我并不完全同意你说的话, 但我不再多说了.
* I thought she was hinting at something but I let it go. 我想她是有所指, 不过我没有理会. ,let oneself `go
(a) no longer restrain one's feelings, desires, etc 尽情发泄感情、放纵欲望等
*Go on, enjoy yourself, let yourself go. 继续玩, 尽情地玩个痛快吧.
(b) stop being careful, tidy, conscientious, etc 不再谨慎、整齐、认真等
*He has let himself go a bit since he lost his job. 他自从失业以来变得有点邋遢了. let sb/sth go; let go of sb/sth release (one's hold of) sb/sth 松开或释放某人[某事物]
*let the rope go/let go of the rope 松开绳子
* Let me go! 让我走!
* Will they let the hostages go? 他们会释放人质吗? let sb `have it (sl 俚) shoot, punish, etc sb 射击或惩罚某人
*Hold this bucket of water, and when he comes round the corner let him have it, ie throw the water at him. 提着这桶水, 等他从拐角那边过来就泼他. let me `see I'm thinking or trying to remember 让我想想
*Let me see where did I leave my hat? 让我想想看--我把帽子落在哪儿了? let us `say for example 比如; 例如; 譬如
*If the price is 500, let us say, is that too much? 价钱嘛, 比如说500英镑吧, 是不是太贵了? to `let available for renting 待租; 出租
*Rooms to let, eg on a sign outside a house 房间出租（如房屋外的招贴）. (For other idioms containing let, see entries for ns, adjs, etc 查阅与let搭配的其他习语见有关名词、形容词等的词条, 如 let alone => alone; let rip => rip.)
6 (phr v) let sb down fail to help sb; disappoint sb 不帮助某人; 使某人失望
*Please come and support me. Don't let me down. 请来支持我. 可别不帮忙.
* This machine won't let you down, ie is very reliable. 这部机器不会出毛病, 你尽管放心. let sth down
(a) lower sth 放下; 降下
*We let the bucket down by a rope. 我们用绳子把桶吊下去.
* This skirt needs letting down, ie lengthening by lowering the hem-line. 这条裙子需要放长.
(b) deflate sth 放掉某物的气
*let sb's tyres down 把某人车胎的气放掉.

/let; lɛt/
n (Brit) letting of property; lease 出租; 租出
*I can't get a let for my house, ie find anyone to rent it from me. 我的房子租不出去.

NOTE ON USAGE 用法
*Compare let, rent and hire. 试比较let、rent、hire这三个词. In British English these three verbs indicate a person giving permission for someone else to use something in return for money 在英式英语中这三个动词均作出租解
*X lets (out)/rents(out)/hires (out) Z to Y. *X把Z租给Y. *Additionally, the user
(Y) can be the subject of rent and hire 此外, 承租人Y亦可作rent和hire的主语
*Y rents/hires Z from X. *Y从X处租用Z. *We usually let (out) accommodation, buildings or land 通常let (out)者为住处、建筑物或土地
*He lets (out) his house to touristsduring the summer. 他夏天把房子租给游客.
* The biggest factory in town is to let. 伦敦最大厂房待租. We rent (out) houses, cars, etc, usually for fairly long periods of time *rent (out)房屋、汽车等通常为期较长
*She decided to rent out a room to get extra income. 她为获得额外收入决定租出一个房间.
* I don't own my video. I rent it from a shop. 我没有录像机, 我是从商店里租来的. We hire (out) a building, car, suit, etc, usually for a short period and for a particular purpose *hire (out)建筑物、汽车、服装等通常是为某种用途短期使用
*They hire out boats by the hour. 他们按小时出租小船.
* The Labour party hired a concert hall for the election meeting. 工党租用音乐厅作选举会场. In US English rent (out) is used in all the above meanings and hire can mean `employ' 在美式英语中rent (out)用于上述各义, 而hire可指employ（雇用）
*The company's hiring more men next week. 该公司下周要再雇些男工. This use is less common in British English. 这种用法在英式英语中不多见.

/let; lɛt/
n
1 (in tennis) ball which, when it is served, hits the top of the net and drops into the opponent's court （网球）（发出的）擦网球.
2 (idm 习语) without ,let or `hindrance (fml or law 文或律) unimpeded; without obstruction 毫无阻碍; 顺畅地
*Please allow the bearer of this passport to pass freely without let or hindrance. 请予护照持有人顺利通行.

Paul Henri Mallet (August 20, 1730 – February 8, 1807) was a Swiss writer.