Simple Definition of underachiever
: someone (such as a student or athlete) who does not perform as well or work as hard as he or she can
First Known Use of underachiever
Medical Definition of underachiever
: a person (as a student) who fails to attain a predicted level of achievement or does not do as well as expected
Learn More about underachiever
Medical Dictionary: Definition of "underachiever"
Seen and Heard
What made you want to look up underachiever? Please tell us where you read or heard it (including the quote, if possible).