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We found 39 dictionaries with English definitions that include the word leap year:
Click on the first link on a line below to go directly to a page where "leap year" is defined.

General (27 matching dictionaries)

1. leap year: Merriam-Webster.com [home, info]
2. leap year: Oxford Dictionaries [home, info]
3. leap year: American Heritage Dictionary of the English Language [home, info]
4. leap year: Collins English Dictionary [home, info]
5. leap year: Vocabulary.com [home, info]
6. leap year: Macmillan Dictionary [home, info]
7. leap-year, leap year: Wordnik [home, info]
8. leap year: Cambridge Advanced Learner's Dictionary [home, info]
9. Leap year, leap-year: Wiktionary [home, info]
10. leap year: The Wordsmyth English Dictionary-Thesaurus [home, info]
11. leap year: Infoplease Dictionary [home, info]
12. Leap year, leap year: Dictionary.com [home, info]
13. leap year: UltraLingua English Dictionary [home, info]
14. Leap Year, Leap year (disambiguation), Leap year: Wikipedia, the Free Encyclopedia [home, info]
15. Leap year: Online Plain Text English Dictionary [home, info]
16. leap year: Rhymezone [home, info]
17. leap year: AllWords.com Multi-Lingual Dictionary [home, info]
18. leap-year: Webster's 1828 Dictionary [home, info]
19. Leap Year: Dictionary of Phrase and Fable (1898) [home, info]
20. Leap-year: 1911 edition of the Encyclopedia Britannica [home, info]
21. leap year: Free Dictionary [home, info]
22. leap year: Mnemonic Dictionary [home, info]
23. leap year: WordNet 1.7 Vocabulary Helper [home, info]
24. leap year: LookWAYup Translating Dictionary/Thesaurus [home, info]
25. leap year: Dictionary/thesaurus [home, info]

Business (3 matching dictionaries)

26. Leap year: Legal dictionary [home, info]
27. leap year: Financial dictionary [home, info]
28. leap year: BusinessDictionary.com [home, info]

Computing (2 matching dictionaries)

29. leap year: CCI Computer [home, info]
30. leap year: Encyclopedia [home, info]

Miscellaneous (1 matching dictionary)

31. Leap Year: Holidays Around the World [home, info]

Science (4 matching dictionaries)

32. Leap Year: A Glossary of Mathematical Terms [home, info]
33. Leap Year: Eric Weisstein's World of Astronomy [home, info]
34. leap year: How Many? A Dictionary of Units of Measurement [home, info]
35. LEAP YEAR: Zoom Astronomy Glossary [home, info]

Slang (1 matching dictionary)

36. leap year: Urban Dictionary [home, info]

Tech (1 matching dictionary)

37. Leap Year: Basics of Space Flight Glossary [home, info]

Quick definitions from WordNet (leap year) ▸ noun:  in the Gregorian calendar: any year divisible by 4 except centenary years not divisible by 400 ▸ Words similar to leap year ▸ Words that often appear near leap year ▸ Rhymes of leap year ▸ Invented words related to leap year