<p><strong>Noun</strong></p><ul><li>A person who performs better or achieves more than people are generally expected to, often because of high ambition, pressure from family, etc.: "Ever the overachiever, he reached his sales goal for the year a whopping five months early."</li><li>A person who performs, especially academically, above the potential indicated by tests of their mental ability or aptitude: "We found many overachievers with modest SAT scores who nevertheless achieved high GPAs across a variety of majors."</li></ul>