radical definition, meaning - what is radical in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “radical”

See all translations

radical

adjective uk   us   /ˈræd.ɪ.kəl/

radical adjective (SUPPORTING CHANGE)

C2 believing or expressing the belief that there should be great or extreme social or political change: He was known as a radical reformer/thinker/politician. These people have very radical views.
More examples

radical adjective (VERY IMPORTANT)

C1 relating to the most important parts of something or someone; complete or extreme: We need to make some radical changes to our operating procedures. She has had to undergo radical surgery (= aimed at removing the cause of a disease).
More examples

radical adjective (extensive)

specialized medical aimed at removing all diseased tissue: Cervical cancer may be cured with radical surgery when it is confined to the pelvis or regional lymph nodes.
radically
adverb uk   us   /-i/
C1 Barker introduced some radically new ideas.

radical

noun [C] uk   us   /ˈræd.ɪ.kəl/
C2 a person who supports great social and political change: She was a radical all her life.
radicalism
noun [U] uk   us   /-ɪ.zəm/
(Definition of radical from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of radical?
Add Cambridge dictionaries to your browser to your website

More meanings of “radical”

Definitions of “radical” in other dictionaries

Word of the Day

disappear off the face of the earth

to disappear completely

Word of the Day

The language of elections

by Liz Walter,
April 22, 2015
On May 7th, citizens of the UK will be going to the polls (having an election) to decide who will form the next government. This kind of election is known as a general election. The country is divided into 650 areas, called constituencies. Each constituency elects a member of parliament (MP) to

Read More 

dumbwalking noun

April 20, 2015
walking slowly, without paying attention to the world around you because you are consulting a smartphone He told me dumbwalking probably wouldn’t be a long-term problem.

Read More