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Allow is used in both formal and informal English. Let is very common in spoken English. You allow someone to do something, but you let someone do something (without "to"): Jenny was allowed to stay up late last night. ♦ Her parents let her stay up late.

You cannot use let in the passive. You must use allow and to : They let him take the test again. ♦ He was allowed to take the test again.

let's used for making suggestions about what you and other people can do

Let's go to the movies tonight. Let's not go out this evening.

let someone down to not do something that you promised to do for someone

Claire let me down. We agreed to meet at eight o'clock but she didn't come.

let go of someone or something ; let someone or something go

to stop holding someone or something

Let go of my hand!

Let me go. You're hurting me!

let someone know

to tell someone something

If you need any help, let me know.

let someone off to not punish someone

He wasn't sent to prison — the judge let him off.

le • thal / ' liei / adjective

Something that is lethal can cause a lot of damage or death a lethal weapon —SYNONYM deadly

let .ter © / irtor / noun [ count ]

a piece of writing that one person sends to another person

He got a letter from his cousin this morning.

I'm writing a thank-you letter for the flowers she sent me.

( english language arts ) a sign in writing that represents a sound in a language

Z is the last letter in the English alphabet.

let•tuce / ' letas / noun [ count, noncount ]

a plant with big green leaves that you eat cold in salads — Look at the picture at vegetable .

leu • ke • mi • a / lu ' kimia / noun [ noncount ]

( health ) a very serious disease of the blood

lev • ee / ' levi / noun [ count ]

( geography ) a low wall built at the side of a river to prevent a flood

leV .el 1© / 'levl/ noun [count ]

the amount, size, or number of something a low level of unemployment

how high something is

The town is 1500 feet above sea level. a beginning-level Spanish class

lev • el 2 / levl / adjective

with no part higher than another part We need level ground to play soccer on.

This shelf isn't level. —SYNONYM flat

at the same height, standard, or position The two teams are level with 40 points each. His head is level with his mother's shoulder.

lev • er / ' levar ; ' livar / noun [ count ]

a handle that you pull or push to make a machine work Pull this lever.

a bar for lifting something heavy or opening something. You put one end under the thing you want to lift or open, and push the other end.

li • a • ble / ' laiabl / adjective

responsible for paying the cost of something Is the company liable for the damage?

be liable to do something

to be likely to do something

We're all liable to have accidents when we're very tired. li • ar / ' laiar / noun [ count ]

a person who says or writes things that are not true (called lies )

I don't believe her — she's a liar. The verb is lie .

li • bel / ' laibl / noun [ count, noncount ]

the act of printing something about someone that is not true and would give people a bad opinion of him or her The actor is suing the newspaper for libel.

lib • er • al aw / ' libaral / Я

A person who is liberal lets other people do and think what they want

Kim's parents are very liberal, but mine are strict.

( politics ) supporting political and social changes to make people more equal

liberal democrats

—ANTONYM conservative

lib • er • al arts / |libaral 'arts / noun [ plural ]