We found 20 dictionaries that define the word down in the mouth:

General (15 matching dictionaries)

1. down in the mouth: Merriam-Webster
2. down in the mouth: Oxford Learner's Dictionaries
3. down-in-the-mouth, down-in-the-mouth, down in the mouth: Collins English Dictionary
4. down in the mouth: Vocabulary.com
5. down in the mouth: Wordnik
6. down in the mouth: Wiktionary
7. Down in the mouth, down in the mouth: Dictionary.com
8. down in the mouth: Rhymezone
9. DOWN IN THE MOUTH: Dictionary of Americanisms (1848)
10. down in the mouth: FreeDictionary.org
11. down in the mouth: Mnemonic Dictionary
12. down-in-the-mouth, down in the mouth: TheFreeDictionary.com
13. down in the mouth: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

14. down-in-the-mouth: Legal dictionary

Computing (1 matching dictionary)

15. down-in-the-mouth, down in the mouth: Encyclopedia

Medicine (2 matching dictionaries)

16. down in the mouth: Merriam-Webster Medical Dictionary
17. down-in-the-mouth: Medical dictionary

Slang (1 matching dictionary)

18. down in the mouth: Urban Dictionary

Definitions from Wiktionary (down in the mouth) ▸ adjective:  (idiomatic) Sad or discouraged, especially as indicated by one's facial appearance. Similar: downcast, downy, downlooked, low-hearted, sad-faced, damp, sad-eyed, muddy, dejected, down-crested, more... Types: sad, depressed, glum, miserable, unhappy, sorrowful, displeased, more... Phrases: he looks down in the mouth, more... ▸ Words similar to down in the mouth ▸ Usage examples for down in the mouth ▸ Idioms related to down in the mouth ▸ Wikipedia articles (New!) ▸ Popular nouns described by down in the mouth ▸ Words that often appear near down in the mouth ▸ Rhymes of down in the mouth ▸ Invented words related to down in the mouth