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Definition of Underachievement
1. Noun. Poorer than expected performance (poorer than might have been predicted from intelligence tests).
Definition of Underachievement
1. Noun. An achievement that is less than expected; underperformance. ¹
¹ Source: wiktionary.com
Medical Definition of Underachievement
1. Performance, usually in school work, poorer than that predicted from aptitude and/or intelligence testing. (12 Dec 1998)