verb (used without object), o·ver·a·chieved, o·ver·a·chiev·ing.
Related formso·ver·a·chieve·ment, nouno·ver·a·chiev·er, noun
Examples from the Web for overachiever
Annie (Alison Brie) was a perfectionist and overachiever who crashed and burned after an Adderall addiction.‘Community’: Season 4 of the NBC Comedy Ponders the End|Jace Lacob|February 6, 2013|DAILY BEAST
To say Paula Broadwell is an overachiever is an understatement.
It will be really, really fast Like that overachiever in your high school, Apple has to be the best at everything.
An overachiever, you nonetheless demand familial support and validation.
Excerpted from Lost in the Meritocracy: The Undereducation of an Overachiever by Walter Kirn ©2009.