Did you know?

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

book - 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 book pronunciation in American English /bʊk/
Word Forms
present tense
present participlebooking
past tensebooked
past participlebooked
  • Facebook
  • Twitter
  1. 1
    [intransitive/transitive] to buy tickets for an event or trip before you go, or to arrange to stay in a hotel at a particular time in the future
    book a flight/tour/trip: Our flight was booked six months ago.
    book in advance: The tours are very popular, so it’s best to book in advance.
    fully booked: I’m sorry sir, that flight is fully booked already.
    Synonyms and related words
    1. a.
      [transitive] to arrange for someone to perform or speak at a public event
      Her job is to book bands for the festival.
      book someone to do something: Several leading businessmen were booked to speak at the conference.
  2. 3
    [intransitive] American spoken to run or move quickly
    book along/down/through: I looked out and saw this guy booking down the street.
    Synonyms and related words
    Synonyms and related words


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