Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “revolutionary”


noun [C]     /ˌrev.əˈluː.ʃən.ər.i/ US  /-er-/
someone who tries to cause or take part in a revolutionActivism and pressure groupsTaking action against people in power
(Definition of revolutionary noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of revolutionary

Definitions of “revolutionary” in other dictionaries

Word of the Day


an ability to do things in the stated, especially positive, way

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More