adjective, noun
adjective [usuallybeforenoun]
1 concerning the most basic and important parts of sth; thorough and complete:
the need for radical changes in education * demands for radical reform of the law * radical differences between the sexes
2 new, different and likely to have a great effect:
radical ideas * a radical solution to the problem * radical proposals / measures
3 in favour of thorough and complete political or social change:
the radical wing of the party * radical politicians / students / writers
4 (AmE, slang) very good
radically adverb:
The new methods are radically different from the old. * Attitudes have changed radically.
noun a person with radical opinions:
political / religious radicals
