XX the short form of 'let us', used especially to make suggestions:
Let's go!

Use let's to make a suggestion about something you and someone else could do together. Let's... is a fairly firm way to suggest something, 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'. Use let's not Let's not tell anyone about this. Let's not go out tonight. Speakers of British English also sometimes say don't let's Don't let's argue.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.