We found 8 dictionaries that define the word underachieved:

General (7 matching dictionaries)

1. underachieved: Merriam-Webster
2. underachieved: Collins English Dictionary
3. underachieved: Wordnik
4. underachieved: Cambridge Advanced Learner's Dictionary
5. underachieved: Wiktionary
6. underachieved: Dictionary.com
7. underachieved: TheFreeDictionary.com

Medicine (1 matching dictionary)

8. underachieved: Merriam-Webster Medical Dictionary

(Note: See underachieve as well.)

Definitions from Wiktionary (underachieve) ▸ verb:  To achieve less than expected; to fail to fulfil one's potential. ▸ Also see underachieve Opposite: overachieved, excelled, succeeded, surpassed ▸ Words similar to underachieved ▸ Usage examples for underachieved ▸ Idioms related to underachieved ▸ Wikipedia articles (New!) ▸ Words that often appear near underachieved ▸ Rhymes of underachieved ▸ Invented words related to underachieved