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.

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

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

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

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 …

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.

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

When a person, idea, movement, or change is described as radical, it implies a substantial and revolutionary departure from the status quo, typically seeking to address perceived injustices, …