Did you know?

Click any word in a definition or example to find the entry for that word

let - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

verb let pronunciation in British English /let/
Word Forms
present tense
present participleletting
past tenselet
past participlelet
  • Facebook
  • Twitter
  1. 1
    [transitive] to allow something to happen
    let someone/something do something: I stepped back and let him pass.
    let someone/something do something: Alice’s mum won’t let her come with us.
    Let your imagination run wild.
    let something in/out/through etc: Open the windows and let some fresh air into the room.
    There are holes between the stones that let the wind through.
    let someone know (=tell someone): Let us know what time you want us to be there.
    let yourself: She lets herself be talked into all kinds of schemes.
  2. 2
    [intransitive/transitive] to rent a room, flat, house etc to someone
    The landlord can let at an agreed market rent.
    let something to someone: He’s let his cottage to some people from London.
  3. 3
    [transitive] [always in imperative] used for giving an order or instruction
    Let the games begin!
  4. 4
    [transitive] [always in imperative] used for showing that you are angry or tired, and do not care what happens
    Let her do all the work for a change!
  5. 5
    [transitive] [usually in imperative] maths used in mathematics for saying that you are imagining that something is true, usually in order to prove a principle of mathematics
    Let x = 5.
    Let ABC be a triangle.



a fashion trend in which people intentionally wear ordinary, inexpensive, widely-available clothing

BuzzWord Article

Open Dictionary


a flower or small bunch of flowers worn on the lapel of a jacket on special occasions

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog