(US campus) a term of utmost approval.
|Campus Sl. Mar. 6: radical – surpassing the usual image of modern and new [...] This is a radical album.|
|Modern English 34: radical (n): A word that college boys use, not radical like Jerry Rubin [...] radical more like an especially colorful Hawaiian shirt.|
|Dict. of Today’s Words.et al.|
|Turning Angel 130: If you’re going to mess with him at all, you want somebody like Dr. Elliott around. Somebody who can get radical if things get out of hand.|