Also found in: Medical, Wikipedia.
Related to let's: Let's Talk


Contraction of let us.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


contraction of
let us: used to express a suggestion, command, etc, by the speaker to himself and his hearers
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


contraction of let us.
usage: See contraction, let1.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


let us
1. let's

You use let's when you are suggesting that you and someone else should do something. Let's is short for 'let us'. It is followed by an infinitive without to.

Let's go outside.
Let's decide what we want.

The full form let us is used with this meaning only in formal English.

Let us postpone the matter.

If you are suggesting that you and someone else should not do something, you say let's not.

Let's not talk about that.
Let's not waste time.
2. 'let us'

When you are talking about you and someone else being allowed to do something, use let us.

They wouldn't let us leave.
His mum let us stay there for free.

You can use let us when you are making a request on behalf of yourself and someone else. In sentences like these, don't shorten let us to 'let's'.

Let us know what progress has been made.
Collins COBUILD English Usage © HarperCollins Publishers 1992, 2004, 2011, 2012
References in classic literature ?
Don't let's talk of such things here," I said hurriedly.
"Let's never tell anyone," said the Story Girl, as we reached home.
"Let's have no more staring and screaming, else we'll have you strapped for a madman.
"Hold your tongue, Jem, and let's hear what he's got to say," said the landlord.
Kitty, dear, let's pretend--' And here I wish I could tell you half the things Alice used to say, beginning with her favourite phrase 'Let's pretend.' She had had quite a long argument with her sister only the day before --all because Alice had begun with 'Let's pretend we're kings and queens;' and her sister, who liked being very exact, had argued that they couldn't, because there were only two of them, and Alice had been reduced at last to say, 'Well, YOU can be one of them then, and I'LL be all the rest.' And once she had really frightened her old nurse by shouting suddenly in her ear, 'Nurse!
Let's pretend there's a way of getting through into it, somehow, Kitty.
Let's have a look at the garden first!' She was out of the room in a moment, and ran down stairs--or, at least, it wasn't exactly running, but a new invention of hers for getting down stairs quickly and easily, as Alice said to herself.
Let's visit the hospitals, orphanages, labour camps around our respective cities and share iftars and meals.
He has worked in LeT's finance department since around 2000.
Nintendo has officially announced the Pokemon games "Let's Go Pikachu!" and "Let's Go Eevee!" for the Switch console.
'The aliases have been added to LeT's designations as a Foreign Terrorist Organisation (FTO) under Section 219 of the Immigration and Nationality Act, and as a Specially Designated Global Terrorist (SDGT) under Executive Order 13224,' read a statement of the State Department.