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

RADICAL definition: 1. believing or expressing the belief that there should be great or extreme social or political…. Learn more.

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

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

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

The indicated root of a quantity or quantities, shown by an expression written under the radical sign.