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.

noun book pronunciation in American English /bʊk/
Word Forms
  1. 1
    [countable] a written work that is published, either as printed pages inside a cover or electronically
    a book by Nelson Mandela, entitled Long Walk to Freedom
    book about/on: I’m reading a book about American history.
    As well as being produced annually in hardback, the book is also published electronically.
    It’s so convenient to find a book online and download it.
    Synonyms and related words
    1. a.
      a set of printed pages fastened together inside a cover
      Please open your books to page 25.
      Synonyms and related words
    2. b.
      one of the sections of a long book such as the Bible
      the Book of Job
      Synonyms and related words
  2. 2
    [countable] something that you write in, consisting of pages fastened together inside a cover
    Visitors to the building must sign the book.
    address/exercise book: I wrote his phone number in my address book.
  3. 3
    [countable] a set of small objects, such as stamps, tickets, or matches, fastened together inside a paper cover
    You can buy stamps in books of ten.
  4. 4


    [plural] business records of the money that an organization or business has earned and spent
    do the books (=record the necessary information in them): Alfred’s job was to do the books at the end of each month.
    1. a.
      records of customers that use a companys services
      on someone’s books: a theatrical agency with dozens of top actors on its books




… a feeling of pleasure you get from spending time doing what you want and not worrying about what other people are doing or saying

BuzzWord Article

Open Dictionary

brain fade

a temporary inability to think clearly or remember information

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