We found 29 dictionaries that define the word futile:

General (26 matching dictionaries)

1. futile: Merriam-Webster
2. futile: Oxford Learner's Dictionaries
3. futile: American Heritage Dictionary of the English Language
4. futile: Collins English Dictionary
5. futile: Vocabulary.com
6. Futile, futile: Wordnik
7. futile: Cambridge Advanced Learner's Dictionary
8. futile: Wiktionary
9. futile: Webster's New World College Dictionary, 4th Ed.
10. futile: The Wordsmyth English Dictionary-Thesaurus
11. futile: Infoplease Dictionary
12. Futile, futile: Dictionary.com
13. futile: Online Etymology Dictionary
14. futile: Cambridge Essential American English Dictionary
15. Futile (EP), Futile (Porcupine Tree album), Futile: Wikipedia, the Free Encyclopedia
16. Futile: Online Plain Text English Dictionary
17. futile: Webster's Revised Unabridged, 1913 Edition
18. futile: Rhymezone
19. futile, futile, futile: AllWords.com Multi-Lingual Dictionary
20. futile: Webster's 1828 Dictionary
21. futile: FreeDictionary.org
22. futile: Mnemonic Dictionary
23. futile: TheFreeDictionary.com
24. futile: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

25. futile: Legal dictionary

Computing (1 matching dictionary)

26. futile: Encyclopedia

Slang (1 matching dictionary)

27. futile: Urban Dictionary

(Note: See futilely as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Incapable of producing results, useless; doomed not to be successful; not worth attempting. ▸ adjective:  Insignificant; frivolous. Similar: otiose, ineffectual, unproductive, useless, unavailing, fruitless, bootless, vain, sleeveless, unfutile, more... Opposite: productive, effective, useful, successful, fruitful Types: futilely, futility, more... Phrases: Futile cycle, futile game, A Futile and Stupid Gesture, Resistance Is Futile, futile efforts, more... Colors:     gray,     charcoal,     taupe,     dust,     pewter, more... ▸ Word origin ▸ Words similar to futile ▸ Usage examples for futile ▸ Idioms related to futile ▸ Wikipedia articles (New!) ▸ Popular nouns described by futile ▸ Words that often appear near futile ▸ Rhymes of futile ▸ Invented words related to futile