adjective
There is a radical error in your approach to the problem. There are radical differences in the ways we regard the English language
We have made radical changes in the way we live. Every political party that is not in power promises radical reform
A staunch conservative, Vincent regarded as radical anyone who disagreed with him
noun
The radicals favour reform, the conservatives the status quo - but there is nothing new in that
Carlo, recently arrested as a spy, had been a radical since his days at university
US