let’s /lets/
the short form of ‘let us’, used especially to make suggestions:
Let’s go!


GRAMMAR
Let's is used to suggest in a fairly firm way that you and someone else should do something together, and is usually used when you think the other person will agree:
Let's go somewhere different tonight.
Let's start by introducing ourselves.
► Do not forget the apostrophe:
Let's go (NOT Lets go).
► To make a negative suggestion, do not say 'let's don't'. Say let's not:
Let's not tell anyone about this.
Speakers of British English also sometimes say don't let's:
Don't let's argue.

[TahlilGaran] Dictionary of Contemporary English ▲