Did you know?

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

dictionary - 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 [countable] dictionary pronunciation in British English /ˈdɪkʃən(ə)ri/
Word Forms
  • Facebook
  • Twitter
  1. 1
    a reference resource which provides information about words and their meanings, uses, and pronunciations. A dictionary may be published as a printed book, or as a digital product such as a website or app, and it may be monolingual, bilingual, or multilingual.

    a dictionary of the English language

    an English-Chinese dictionary

  2. 2
    a book, website or other resource which deals with a particular subject, providing the words, phrases, and terms used in that field, with information about their meaning and use

    a dictionary of art/music/biology

Open Dictionary


another way of saying congratulations, or that something/someone looks nice or fascinating

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
Macmillan learn live love play