We found 10 dictionaries that define the word underachievers:

General (9 matching dictionaries)

1. underachievers: Merriam-Webster
2. underachievers: Collins English Dictionary
3. underachievers: Vocabulary.com
4. Underachievers, underachievers: Wordnik
5. underachievers: Cambridge Advanced Learner's Dictionary
6. underachievers: Wiktionary
7. underachievers: Cambridge Essential American English Dictionary
8. The Underachievers (film), The Underachievers: Wikipedia, the Free Encyclopedia
9. underachievers: TheFreeDictionary.com

Medicine (1 matching dictionary)

10. underachievers: Merriam-Webster Medical Dictionary

(Note: See underachiever as well.)

Definitions from Wiktionary (underachiever) ▸ noun:  One who underachieves, i.e. performs less well than expected. ▸ Also see underachiever Phrases: The Underachievers, more... ▸ Words similar to underachievers ▸ Usage examples for underachievers ▸ Idioms related to underachievers ▸ Wikipedia articles (New!) ▸ Popular adjectives describing underachievers ▸ Words that often appear near underachievers ▸ Rhymes of underachievers ▸ Invented words related to underachievers