We found 14 dictionaries that define the word word-of-mouth:

General (10 matching dictionaries)

1. word-of-mouth: Merriam-Webster
2. word-of-mouth, word-of-mouth: Collins English Dictionary
3. word-of-mouth: Vocabulary.com
4. word-of-mouth: Wiktionary
5. word-of-mouth: Dictionary.com
6. Word-of-mouth: Wikipedia, the Free Encyclopedia
7. word-of-mouth: Rhymezone
8. word-of-mouth: FreeDictionary.org
9. word-of-mouth: Mnemonic Dictionary
10. word-of-mouth: TheFreeDictionary.com

Art (1 matching dictionary)

11. Movie Terminology Glossary (No longer online)

Business (1 matching dictionary)

12. word-of-mouth: Legal dictionary

Computing (1 matching dictionary)

13. word-of-mouth: Encyclopedia

Miscellaneous (1 matching dictionary)

14. word-of-mouth: Idioms

Definitions from Wiktionary (Word-of-mouth) ▸ noun:  (attributive) Alternative spelling of word of mouth [(idiomatic) Verbal means of passing on information; viva voce.] Similar: spoken, viva-voce, word of mouth, word, mouth, byword, winged word, spoken word, verbal communication, speech, more... Opposite: advertising, promotion, marketing Phrases: Word-of-mouth marketing, more... ▸ Words similar to word-of-mouth ▸ Usage examples for word-of-mouth ▸ Idioms related to word-of-mouth ▸ Wikipedia articles (New!) ▸ Popular adjectives describing word-of-mouth ▸ Words that often appear near word-of-mouth ▸ Rhymes of word-of-mouth ▸ Invented words related to word-of-mouth