We found 27 dictionaries that define the word no-brainer:

General (20 matching dictionaries)

1. no-brainer: Merriam-Webster
2. no-brainer: Oxford Learner's Dictionaries
3. no-brainer: American Heritage Dictionary of the English Language
4. no-brainer, no-brainer: Collins English Dictionary
5. no-brainer: Vocabulary.com
6. No-Brainer, No-brainer, no-brainer: Wordnik
7. no-brainer: Cambridge Advanced Learner's Dictionary
8. no-brainer: Wiktionary
9. no-brainer: Webster's New World College Dictionary, 4th Ed.
10. no-brainer: Infoplease Dictionary
11. no-brainer: Dictionary.com
12. no-brainer: Cambridge Essential American English Dictionary
13. The No-Brainer: Wikipedia, the Free Encyclopedia
14. no-brainer: Rhymezone
15. no-brainer: Stammtisch Beau Fleuve Acronyms
16. no-brainer: FreeDictionary.org
17. no-brainer: Mnemonic Dictionary
18. no-brainer: TheFreeDictionary.com

Business (3 matching dictionaries)

19. MoneyGlossary.com (No longer online)
20. No-Brainer: Financial dictionary
21. BusinessDictionary.com (No longer online)

Slang (3 matching dictionaries)

22. no-brainer: Green’s Dictionary of Slang
23. American-Australian Slang Dictionary (No longer online)
24. no-brainer: Urban Dictionary

Sports (1 matching dictionary)

25. No-Brainer: Backgammon

(Note: See no-brainers as well.)

Definitions from WordNet ( ) ▸ noun:  anything that requires little thought Similar: nobrainer, bright-line rule, plain sailing, snap judgment, automaticity, simplicity, walkover, nonconsequence, uncomplication, incomplexity, more... Opposite: difficult decision, complex choice Types: easy, simple, obvious, apparent, evident, more... ▸ Words similar to no-brainer ▸ Usage examples for no-brainer ▸ Idioms related to no-brainer ▸ Wikipedia articles (New!) ▸ Popular adjectives describing no-brainer ▸ Words that often appear near no-brainer ▸ Rhymes of no-brainer ▸ Invented words related to no-brainer