Of or going to the root or origin; See examples of radical used in a sentence. Definition of radical adjective in oxford advanced learner's dictionary.

The meaning of radical is of, relating to, or proceeding from a root. How to use radical in a sentence. 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 … Believing or expressing the belief that there should be great or extreme social or political…. Learn more.

The use of the word for single atoms is now unusual … Believing or expressing the belief that there should be great or extreme social or political…. Learn more. Very new and different from what is traditional or ordinary; Very basic and important Relating to or advocating fundamental or revolutionary changes in current practices, conditions, or institutions: A radical political theorist.

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