/ Dictionary / Index O overachieve: Meaning and Definition of Find definitions for: o•ver•a•chieve Pronunciation: (ō"vur-u-chēv'), [key] — -chieved, -chiev•ing. to perform, esp. academically, above the potential indicated by tests of one's mental ability or aptitude. to perform better or achieve more than expected, esp. by others. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overachieve (Thesaurus) overabundance overact Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language