The past few years have witnessed radical improvements to the system. The company is undergoing a radical shake-up. The new management will make radical changes. I'm just having my hair trimmed - …

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Jan 20, 2026 · Adjective [edit] radical (comparative more radical, superlative most radical) Favoring fundamental change, or change at the root cause of a matter.

a person holding radical views, esp. one favoring fundamental social or economic change

thoroughgoing, complete, or extreme: a radical change in policy. Government favoring drastic or extreme political, economic, or social reforms: radical politics.

An individual atom or element as a constituent of a compound was formerly termed a simple radical, as distinct from a group or compound radical. The use of the word for single atoms is now unusual …

Definition of radical adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

The meaning of RADICAL is of, relating to, or proceeding from a root. How to use radical in a sentence.

Relating to or advocating fundamental or revolutionary changes in current practices, conditions, or institutions: radical politics; a radical political theorist.

RADICAL meaning: 1 : very new and different from what is traditional or ordinary; 2 : very basic and important