American Dictionary

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Definition radical in American English

radical adjective

adjective
/ˈrædɪk(ə)l/
1

a radical change or way of doing something is new and very different from the usual way

Example

a more radical approach to social problems

Example

a program of radical reforms in schools

Example

a radical solution to the problem of juvenile crime

Example

members of a radical left-wing group

Example

a radical feminist

Example

radical right-wing politicians

Synonyms and related words
2.1

radical opinions are based on the belief that important political or social changes are necessary

Example

He surprised us all with his radical views.

Example

her radical ideas about education

Synonyms and related words
3

relating to the most basic or important part of something

Example

There was a radical difference between their views on foreign policy.

Synonyms and related words
4

a radical increase or decrease is extremely large and important

Example

radical cuts in the defense budget

Definition radical in American English