Definitions for underachievement
Random House Webster's College Dictionary
un•der•a•chieveˌʌn dər əˈtʃiv(v.i.)-a•chieved, -a•chiev•ing.
to perform below the potential indicated by tests of one's mental ability or aptitude.
to perform below expectations; achieve less than expected.
Origin of underachieve:
poorer than expected performance (poorer than might have been predicted from intelligence tests)
An achievement that is less than expected; underperformance.
U.S. National Library of Medicine
Performance, usually in school work, poorer than that predicted from aptitude and/or intelligence testing.
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