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We found 47 dictionaries with English definitions that include the word flu:
Click on the first link on a line below to go directly to a page where "flu" is defined.

General (29 matching dictionaries)

1. flu: Merriam-Webster.com [home, info]
2. flu: Oxford Learner's Dictionaries [home, info]
3. flu: American Heritage Dictionary of the English Language [home, info]
4. flu, the flu: Collins English Dictionary [home, info]
5. flu: Vocabulary.com [home, info]
6. flu: Macmillan Dictionary [home, info]
7. Flu, flu: Wordnik [home, info]
8. flu: Cambridge Advanced Learner's Dictionary [home, info]
9. 'flu, flu: Wiktionary [home, info]
10. flu: Webster's New World College Dictionary, 4th Ed. [home, info]
11. flu: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. flu: Infoplease Dictionary [home, info]
13. flu: Dictionary.com [home, info]
14. flu: Online Etymology Dictionary [home, info]
15. flu: UltraLingua English Dictionary [home, info]
16. flu: Cambridge Dictionary of American English [home, info]
17. FLU, Flu (disambiguation), Flu (film), Flu, The Flu (Parks and Recreation), The Flu (film), The Flu, The flu: Wikipedia, the Free Encyclopedia [home, info]
18. flu: Rhymezone [home, info]
19. FLU, flu: Stammtisch Beau Fleuve Acronyms [home, info]
20. flu: All About Homonyms [home, info]
21. flu: Free Dictionary [home, info]
22. flu: Mnemonic Dictionary [home, info]
23. flu: WordNet 1.7 Vocabulary Helper [home, info]
24. flu: LookWAYup Translating Dictionary/Thesaurus [home, info]
25. flu: Dictionary/thesaurus [home, info]
26. flu: Wikimedia Commons US English Pronunciations [home, info]
27. Flu (m): AllWords.com Multi-Lingual Dictionary [home, info]

Art (1 matching dictionary)

28. flu-: A Cross Reference of Latin and Greek Elements [home, info]

Computing (2 matching dictionaries)

29. flu: CCI Computer [home, info]
30. Flu (disambiguation), The flu, flu: Encyclopedia [home, info]

Medicine (10 matching dictionaries)

31. Flu: MedTerms.com Medical Dictionary [home, info]
32. Flu: Merck Manuals [home, info]
33. flu: online medical dictionary [home, info]
34. Flu: Health and Wellness Dictionary [home, info]
35. FLU: Probert Encyclopaedia of Medicine [home, info]
36. The flu: MEDLINE plus Illustrated Medical Encyclopedia [home, info]
37. Flu: A-Z Family health glossary [home, info]
38. Flu (disambiguation), The flu, flu: Medical dictionary [home, info]
39. Flu, The flu: University of Maryland Glossary of Medical Terms [home, info]
40. Flu: Drug Medical Dictionary [home, info]

Miscellaneous (4 matching dictionaries)

41. flu: Sound-Alike Words [home, info]
42. FLU: Acronym Finder [home, info]
43. FLU: Three Letter Words with definitions [home, info]
44. FLU: AbbreviationZ [home, info]

Slang (1 matching dictionary)

45. Flu, The Flu: Urban Dictionary [home, info]

(Note: See flus for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (flu) ▸ noun:  an acute febrile highly contagious viral disease ▸ Also see flus ▸ Word origin ▸ Words similar to flu ▸ Usage examples for flu ▸ Idioms related to flu (New!) ▸ Popular adjectives describing flu ▸ Words that often appear near flu ▸ Rhymes of flu ▸ Invented words related to flu