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English definition of “revolutionary”

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revolutionary

adjective uk   /ˌrev.əˈluː.ʃən.ər.i/ us    /-er-/

revolutionary adjective (IN POLITICS)

B2 involved in or relating to a revolution: a revolutionary leader/movement
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revolutionary adjective (NEW AND IMPORTANT)

B2 completely new and having a great effect: Penicillin was a revolutionary drug. The 20th century brought about revolutionary changes in our lifestyles.

revolutionary

noun [C] uk   /ˌrev.əˈluː.ʃən.ər.i/ us    /-er-/
someone who tries to cause or take part in a revolution
(Definition of revolutionary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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