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We found 44 dictionaries with English definitions that include the word must:
Click on the first link on a line below to go directly to a page where "must" is defined.

General (34 matching dictionaries)

1. must: Merriam-Webster.com [home, info]
2. must, must, must, must, must-: Oxford Dictionaries [home, info]
3. must, must, must, must, must: American Heritage Dictionary of the English Language [home, info]
4. must, must-: Collins English Dictionary [home, info]
5. must: Vocabulary.com [home, info]
6. must, must, must-: Macmillan Dictionary [home, info]
7. Must, must: Wordnik [home, info]
8. must, must-: Cambridge Advanced Learner's Dictionary [home, info]
9. must: Wiktionary [home, info]
10. must: Webster's New World College Dictionary, 4th Ed. [home, info]
11. must: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. must: Infoplease Dictionary [home, info]
13. must: Dictionary.com [home, info]
14. must (n1.), must (n2.), must (n3.), must (v.): Online Etymology Dictionary [home, info]
15. must: UltraLingua English Dictionary [home, info]
16. must: Cambridge Dictionary of American English [home, info]
17. must: Cambridge International Dictionary of Idioms [home, info]
18. Must (disambiguation), Must: Wikipedia, the Free Encyclopedia [home, info]
19. Must: Online Plain Text English Dictionary [home, info]
20. must: Webster's Revised Unabridged, 1913 Edition [home, info]
21. must: Rhymezone [home, info]
22. must: AllWords.com Multi-Lingual Dictionary [home, info]
23. must: Webster's 1828 Dictionary [home, info]
24. must: All About Homonyms [home, info]
25. must: Hutchinson's Dictionary of Difficult Words [home, info]
26. must: Free Dictionary [home, info]
27. must: Hutchinson Dictionaries [home, info]
28. must: Mnemonic Dictionary [home, info]
29. must: WordNet 1.7 Vocabulary Helper [home, info]
30. must: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. must, must-: Dictionary/thesaurus [home, info]
32. must: Wikimedia Commons US English Pronunciations [home, info]

Art (2 matching dictionaries)

33. Must: Epicurus.com Wine Glossary [home, info]
34. MUST: Shakespeare Glossary [home, info]

Computing (1 matching dictionary)

35. must: Encyclopedia [home, info]

Medicine (1 matching dictionary)

36. MUST: Medical dictionary [home, info]

Miscellaneous (3 matching dictionaries)

37. MUST: Acronym Finder [home, info]
38. MUST: AbbreviationZ [home, info]
39. must: Idioms [home, info]

Slang (1 matching dictionary)

40. must: Urban Dictionary [home, info]

Tech (2 matching dictionaries)

41. MUST: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]
42. must: Wine Glossary [home, info]

(Note: See musts for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (must) ▸ noun:  grape juice before or during fermentation ▸ noun:  a necessary or essential thing ("Seat belts are an absolute must") ▸ noun:  the quality of smelling or tasting old or stale or mouldy ▸ name:  A surname (very rare: popularity rank in the U.S.: #61679) ▸ Also see musts ▸ Word origin ▸ Words similar to must ▸ Usage examples for must ▸ Popular adjectives describing must ▸ Words that often appear near must ▸ Rhymes of must ▸ Invented words related to must