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

If something is considered extremist or very different from anything that has come before it, call it radical.

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

Definition of radical adjective from the Oxford Advanced Learner's Dictionary. relating to the most basic and important parts of something; complete and detailed synonym far-reaching. This …

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

Dec 18, 2025 · 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.

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

RADICAL definition: of or going to the root or origin; fundamental. See examples of radical used in a sentence.

In chemistry, a radical is an atom, molecule, or ion that has unpaired valence electrons or an open electron shell, and therefore may be seen as having one or more "dangling" covalent bonds.