We found 21 dictionaries that define the word grumbler:

General (16 matching dictionaries)

1. grumbler: Merriam-Webster
2. grumbler: Oxford Learner's Dictionaries
3. grumbler: Collins English Dictionary
4. grumbler: Vocabulary.com
5. Grumbler, grumbler: Wordnik
6. grumbler: Cambridge Advanced Learner's Dictionary
7. grumbler: Wiktionary
8. Grumbler, grumbler: Dictionary.com
9. Grumbler: Online Plain Text English Dictionary
10. grumbler: Webster's Revised Unabridged, 1913 Edition
11. grumbler: Rhymezone
12. Grumbler: AllWords.com Multi-Lingual Dictionary
13. grumbler: Webster's 1828 Dictionary
14. grumbler: FreeDictionary.org
15. grumbler: Mnemonic Dictionary
16. grumbler: TheFreeDictionary.com

Business (1 matching dictionary)

17. grumbler: Legal dictionary

Computing (1 matching dictionary)

18. grumbler: Encyclopedia

Miscellaneous (1 matching dictionary)

19. grumbler: Idioms

Slang (2 matching dictionaries)

20. grumbler: Green’s Dictionary of Slang
21. grumbler: Urban Dictionary

(Note: See grumble as well.)

Definitions from Wiktionary (grumbler) ▸ noun:  A person who persistently grumbles; a complainer. Similar: complainer, whiner, crybaby, sniveler, moaner, bellyacher, squawker, grouser, grump, grumpster, more... Adjectives: old, chronic, such, inveterate, habitual, frampold, mere, unreasonable, eternal, discontented, loudest ▸ Words similar to grumbler ▸ Usage examples for grumbler ▸ Idioms related to grumbler ▸ Wikipedia articles (New!) ▸ Popular adjectives describing grumbler ▸ Words that often appear near grumbler ▸ Rhymes of grumbler ▸ Invented words related to grumbler