We found 9 dictionaries that define the word do one's best:

General (9 matching dictionaries)

1. do one's best: Merriam-Webster
2. do one's best: Oxford Learner's Dictionaries
3. do one's best: Vocabulary.com
4. do one's best: Dictionary.com
5. do one's best: Rhymezone
6. do ones best: FreeDictionary.org
7. do one's best: Mnemonic Dictionary
8. do one's best: TheFreeDictionary.com
9. do one's best: Wiktionary

Definitions from Wiktionary (do one's best) ▸ verb:  To do as best one can. Phrases: do ones level best, to do ones best, more... ▸ Words similar to do one's best ▸ Usage examples for do one's best ▸ Idioms related to do one's best ▸ Wikipedia articles (New!) ▸ Words that often appear near do one's best ▸ Rhymes of do one's best ▸ Invented words related to do one's best