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We found 45 dictionaries with English definitions that include the word mum:
Click on the first link on a line below to go directly to a page where "mum" is defined.

General (34 matching dictionaries)

1. mum: Merriam-Webster.com [home, info]
2. mum, mum, mum, mum: Oxford Dictionaries [home, info]
3. mum, mum, mum, mum, mum: American Heritage Dictionary of the English Language [home, info]
4. mum: Collins English Dictionary [home, info]
5. mum: Vocabulary.com [home, info]
6. mum: Macmillan Dictionary [home, info]
7. Mum, mum: Wordnik [home, info]
8. mum: Cambridge Advanced Learner's Dictionary [home, info]
9. Mum: Wiktionary [home, info]
10. mum: Webster's New World College Dictionary, 4th Ed. [home, info]
11. mum: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. mum: Infoplease Dictionary [home, info]
13. Mum, mum: Dictionary.com [home, info]
14. mum (interj.), mum (n.1), mum (n.2): Online Etymology Dictionary [home, info]
15. mum: UltraLingua English Dictionary [home, info]
16. mum: Cambridge Dictionary of American English [home, info]
17. mum: Cambridge International Dictionary of Idioms [home, info]
18. Mum (TV series), Mum (band), Mum (deodorant), Mum (disambiguation), Mum (song), Mum: Wikipedia, the Free Encyclopedia [home, info]
19. Mum: Online Plain Text English Dictionary [home, info]
20. mum: Webster's Revised Unabridged, 1913 Edition [home, info]
21. mum: Rhymezone [home, info]
22. mum: AllWords.com Multi-Lingual Dictionary [home, info]
23. mum: Webster's 1828 Dictionary [home, info]
24. Mum: Britih-American Dictionary [home, info]
25. MUM: Stammtisch Beau Fleuve Acronyms [home, info]
26. Mum: Dictionary of Phrase and Fable (1898) [home, info]
27. mum: Free Dictionary [home, info]
28. mum: Mnemonic Dictionary [home, info]
29. mum: WordNet 1.7 Vocabulary Helper [home, info]
30. mum: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. mum: Dictionary/thesaurus [home, info]
32. mum: Wikimedia Commons US English Pronunciations [home, info]

Business (1 matching dictionary)

33. mum: Legal dictionary [home, info]

Computing (1 matching dictionary)

34. mum: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

35. Mum: Glossary of Herbs, Botanicals and Other Products [home, info]
36. mum: Medical dictionary [home, info]

Miscellaneous (5 matching dictionaries)

37. MUM: Acronym Finder [home, info]
38. mum: Magic or Madness [home, info]
39. MUM: Three Letter Words with definitions [home, info]
40. MUM: AbbreviationZ [home, info]
41. mum: Idioms [home, info]

Science (1 matching dictionary)

42. Mum: Dictionary of Horticultural Terms [home, info]

Tech (1 matching dictionary)

43. Mum: The Turkish Food and Beverage Page [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (mum) ▸ noun:  secrecy ("Mum's the word") ▸ noun:  of China ▸ noun:  informal terms for a mother ▸ adjective:  failing to speak or communicate etc when expected to ▸ Word origin ▸ Words similar to mum ▸ Usage examples for mum ▸ Popular adjectives describing mum ▸ Popular nouns described by mum ▸ Words that often appear near mum ▸ Rhymes of mum ▸ Invented words related to mum