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We found 54 dictionaries with English definitions that include the word day:
Click on the first link on a line below to go directly to a page where "day" is defined.

General (33 matching dictionaries)

1. Day, day: Merriam-Webster.com [home, info]
2. day, day, the day: Oxford Learner's Dictionaries [home, info]
3. day: American Heritage Dictionary of the English Language [home, info]
4. day: Collins English Dictionary [home, info]
5. Day, day: Vocabulary.com [home, info]
6. day: Macmillan Dictionary [home, info]
7. DAy, Day, Day, day, day: Wordnik [home, info]
8. day: Cambridge Advanced Learner's Dictionary [home, info]
9. Day, day: Wiktionary [home, info]
10. day: Webster's New World College Dictionary, 4th Ed. [home, info]
11. day: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. day: Infoplease Dictionary [home, info]
13. DAY: Dictionary.com [home, info]
14. day: Online Etymology Dictionary [home, info]
15. Day, day: UltraLingua English Dictionary [home, info]
16. day: Cambridge Dictionary of American English [home, info]
17. day, day, day: Cambridge International Dictionary of Idioms [home, info]
18. DAY, Day (Kennedy novel), Day (Michelangelo), Day (Wiesel novel), Day (disambiguation), Day (surname), Day, The Day (Babyface), The Day (Babyface album), The Day (Day6 EP), The Day (Deen album), The Day (EP), The Day (Moby song), The Day (New London), The Day (Reckless Kelly album), The Day (film), The Day (newspaper), The Day (song), The Day (website), The Day, The day: Wikipedia, the Free Encyclopedia [home, info]
19. Day: Online Plain Text English Dictionary [home, info]
20. day: Webster's Revised Unabridged, 1913 Edition [home, info]
21. Day: Rhymezone [home, info]
22. day: AllWords.com Multi-Lingual Dictionary [home, info]
23. day: Webster's 1828 Dictionary [home, info]
24. Day: E Cobham Brewer, The Reader's Handbook [home, info]
25. Day: Dictionary of Phrase and Fable (1898) [home, info]
26. day: Free Dictionary [home, info]
27. day: Mnemonic Dictionary [home, info]
28. day: WordNet 1.7 Vocabulary Helper [home, info]
29. Day, day: LookWAYup Translating Dictionary/Thesaurus [home, info]
30. Day: Dictionary/thesaurus [home, info]
31. day: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

32. day: The Organon: A Conceptually Indexed Dictionary (by Genus and Differentia) [home, info]

Business (3 matching dictionaries)

33. DAY: Bouvier's Law Dictionary 1856 Edition [home, info]
34. day: Legal dictionary [home, info]
35. day: BusinessDictionary.com [home, info]

Computing (1 matching dictionary)

36. day: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

37. day: online medical dictionary [home, info]
38. day: Medical dictionary [home, info]

Miscellaneous (6 matching dictionaries)

39. day: Encyclopedia of Graphic Symbols [home, info]
40. Day: Brilliant Dream Dictionary [home, info]
41. DAY: Acronym Finder [home, info]
42. DAY: Three Letter Words with definitions [home, info]
43. DAY: AbbreviationZ [home, info]
44. day: Idioms [home, info]

Religion (2 matching dictionaries)

45. Day: Easton Bible [home, info]
46. Day: Smith's Bible Dictionary [home, info]

Science (4 matching dictionaries)

47. Day: Eric Weisstein's World of Astronomy [home, info]
48. Day: Extragalactic Astronomy [home, info]
49. day [1], day [2], day [3]: How Many? A Dictionary of Units of Measurement [home, info]
50. DAY: Weather Glossary [home, info]

Slang (1 matching dictionary)

51. The DAY, day: Urban Dictionary [home, info]

Tech (1 matching dictionary)

52. day: Glossary of Meteorology [home, info]

(Note: See days for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (Day) ▸ noun:  United States writer best known for his autobiographical works (1874-1935) ▸ noun:  a period of opportunity ("He deserves his day in court") ▸ noun:  some point or period in time ("It should arrive any day now") ▸ noun:  the recurring hours when you are not sleeping (especially those when you are working) ("My day began early this morning") ▸ noun:  time for Earth to make a complete rotation on its axis ("Two days later they left") ▸ noun:  a day assigned to a particular purpose or observance ("Mother's Day") ▸ noun:  the time after sunrise and before sunset while it is light outside ("The dawn turned night into day") ▸ noun:  the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis ("How long is a day on Jupiter?") ▸ noun:  an era of existence or influence ("In the day of the dinosaurs") ▸ noun:  the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day ▸ name:  A surname (common: 1 in 2325 families; popularity rank in the U.S.: #245) ▸ Also see days ▸ Word origin ▸ Words similar to day ▸ Usage examples for day ▸ Idioms related to day (New!) ▸ Popular adjectives describing day ▸ Words that often appear near day ▸ Rhymes of day ▸ Invented words related to day