To be thought of as pretty much totally amazing; awesome.

To be more radical then normally thought possible by non-rad people.

Used to describe a person, place, thing, situation, feeling, action, or thought that is overwhelmingly cool and/or hella awesome.

The term referring to Kimberly Sian Parry, the manchild who usually can be found riding her sporter scooter up and down Fforddisa every single day and night like the rad gal he/she is.

She always wears a helmet.