Adjective > Radical

[more radical; most radical]

1 a : very new and different from what is traditional or ordinary

The computer has introduced radical innovations.

radical ideas about education

b : very basic and important

There are some radical differences between the two proposals.

The new president has made some radical changes to the company.

radical reforms

2 : having extreme political or social views that are not shared by most people

radical liberals/conservatives

a radical wing of extremists