Usually means: Not meeting their full potential.
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We found 22 dictionaries that define the word underachiever:

General (18 matching dictionaries)
  1. underachiever: Longman Dictionary of Contemporary English
  2. underachiever: Merriam-Webster
  3. underachiever: Oxford Learner's Dictionaries
  4. underachiever: Collins English Dictionary
  5. underachiever: Vocabulary.com
  6. Underachiever, underachiever: Wordnik
  7. underachiever: Cambridge Advanced Learner's Dictionary
  8. underachiever: Wiktionary
  9. underachiever: Infoplease Dictionary
  10. underachiever: Dictionary.com
  11. underachiever: Cambridge Essential American English Dictionary
  12. Underachiever: Wikipedia, the Free Encyclopedia
  13. underachiever: Rhymezone
  14. underachiever: FreeDictionary.org
  15. underachiever: Mnemonic Dictionary
  16. underachiever: TheFreeDictionary.com

Medicine (3 matching dictionaries)
  1. underachiever: Merriam-Webster Medical Dictionary
  2. Underachiever: MedFriendly Glossary
  3. online medical dictionary (No longer online)

Slang (1 matching dictionary)
  1. underachiever: Urban Dictionary

(Note: See underachieve as well.)

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Definitions from Wiktionary (
)
American English Definition British English Definition
▸ noun:  One who underachieves, i.e. performs less well than expected.

Similar:
underdeliverer, underfunctioner, underuser, undereater, underproducer, underreporter, undervaluer, undershooter, underworker, underinvestor, more...

Opposite:
overachiever, high achiever, successful person

Adjectives:
gifted, classic, chronic, academic, bright, typical, aggressive, high, lazy, economic, male



▸ Words similar to underachiever

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▸ Wikipedia articles (New!)

▸ Popular adjectives describing underachiever

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▸ Rhymes of underachiever

▸ Invented words related to underachiever

Similar:
underdeliverer, underfunctioner, underuser, undereater, underproducer, underreporter, undervaluer, undershooter, underworker, underinvestor, more...

Opposite:
overachiever, high achiever, successful person

Adjectives:
gifted, classic, chronic, academic, bright, typical, aggressive, high, lazy, economic, male



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