Pronunciation: (ō"vur-u-chēv'), [key]
—v.i., -chieved, -chiev•ing.
1. to perform, esp. academically, above the potential indicated by tests of one's mental ability or aptitude.
2. to perform better or achieve more than expected, esp. by others.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.