English

Definition of underachiever noun from the Oxford Advanced Learner's Dictionary

 

underachiever

 noun
noun
BrE BrE//ˌʌndərəˈtʃiːvə(r)//
 
; NAmE NAmE//ˌʌndərəˈtʃiːvər//
 
 
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a person who does less well than they could do, especially in school work
See the Oxford Advanced American Dictionary entry: underachiever