Did you know?

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

dumb - 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.



Thesaurus diagram

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.

adjective     dumb pronunciation in British English
Word Forms
  1. 1
    informal stupid

    She’s so dumb she can’t even figure out her answering machine.

    You gave him your phone number? That was a dumb thing to do.

  2. 2
    mainly literary temporarily unable or unwilling to speak, especially because you are very shocked

    Some of the passengers were dumb with terror.

    be struck dumb:

    I was struck dumb by the clerk’s rudeness.

derived word

quiz invitation


a description of an economic or political situation based on analysis of information at the present time

BuzzWord Article

Open Dictionary


an unregulated form of capitalism that features financial deregulation, privatisation and low tax for high earners

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