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English definition of “radical”

radical

adjective     /ˈrædɪkəl/
CHANGE A radical change is very big and important: a radical reform Very and extremeComplete and wholeIntensifying expressions
BELIEFS believing that there should be big social and political changes: a radical group/movement a radical proposal Political movements and groups
radically adverb The company has changed radically in recent years.
(Definition of radical adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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