WordReference Random House Unabridged Dictionary of American English © 2025
un•der•a•chiev•er
(un′dər ə chē′vər),USA pronunciation n.
WordReference Random House Learner's Dictionary of American English © 2025- Psychologya student who performs less well in school than would be expected on the basis of abilities indicated by intelligence and aptitude tests, etc.
- Educationa person or thing that performs below expectations.
- under- + achiever 1945–50
un•der•a•chieve /ˌʌndərəˈtʃiv/USA pronunciation
v. [no object], -a•chieved, -a•chiev•ing.
WordReference Random House Unabridged Dictionary of American English © 2025- Educationto perform below the possibility or potential that one possesses as shown by tests of one's mental ability.
- Educationto perform below expectations;
achieve less than that which is expected.
un•der•a•chieve
(un′dər ə chēv′),USA pronunciation v.i., -a•chieved, -a•chiev•ing.
un′der•a•chieve′ment, n.
- Educationto perform, esp. academically, below the potential indicated by tests of one's mental ability or aptitude.
- Educationto perform below expectations or achieve less than expected, esp. by others.
- under- + achieve 1950–55