OVERACHIEVER By N., Pam M.S. - April 7, 2013 noun. an individual, like a pupil, who reach levels of success beyond their capacity as calculated and expected by aptitude and general-intelligence exams. OVERACHIEVER: "Jack was a classic overachiever in his teachers' opinions." Related Psychology Terms APTITUDE CORRELATION BARRIER LEVELS OF INTELLIGENCE ACADEMIC-ACHIEVEMENT PREDICTION UNDERACHIEVER ACHIEVEMENT TEST SCHOLASTIC ACHIEVEMENT TEST FECUNDITY MENTAL AGE (MA) FREEDOM FROM DISTRACTIBILITY INDEX Cite this page: N., Pam M.S., "OVERACHIEVER," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/overachiever/ (accessed May 10, 2021).