Did you know?

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

radical - 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.

adjective radical pronunciation in British English /ˈrædɪk(ə)l/
  • Facebook
  • Twitter
  1. 1
    a radical change or way of doing something is new and very different from the usual way
    a more radical approach to social problems
    a radical solution to the problem of juvenile crime
    a programme of radical reforms in schools
  2. 3
    a radical person or group believes that important political or social changes are necessary
    members of a radical left-wing group
    a radical feminist
    radical right-wing politicians
    1. a.
      radical opinions are based on the belief that important political or social changes are necessary
      He surprised us all with his radical views.
      her radical ideas about education
  3. 4
    relating to the most basic or important part of something
    There was a radical difference between their views on foreign policy.
    Synonyms and related words


a meal served in the evening which consists of foods traditionally eaten at breakfast

BuzzWord Article

Open Dictionary

troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

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