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We found 43 dictionaries with English definitions that include the word diagonal:
Click on the first link on a line below to go directly to a page where "diagonal" is defined.

General (30 matching dictionaries)

1. diagonal: Merriam-Webster.com [home, info]
2. diagonal: Oxford Dictionaries [home, info]
3. diagonal: American Heritage Dictionary of the English Language [home, info]
4. diagonal: Collins English Dictionary [home, info]
5. diagonal: Vocabulary.com [home, info]
6. diagonal, diagonal: Macmillan Dictionary [home, info]
7. Diagonal, diagonal: Wordnik [home, info]
8. diagonal: Cambridge Advanced Learner's Dictionary [home, info]
9. Diagonal, diagonal: Wiktionary [home, info]
10. diagonal: Webster's New World College Dictionary, 4th Ed. [home, info]
11. diagonal: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. diagonal: Infoplease Dictionary [home, info]
13. diagonal: Dictionary.com [home, info]
14. diagonal: Online Etymology Dictionary [home, info]
15. Diagonal, diagonal: UltraLingua English Dictionary [home, info]
16. diagonal: Cambridge Dictionary of American English [home, info]
17. Diagonal: Wikipedia, the Free Encyclopedia [home, info]
18. Diagonal: Online Plain Text English Dictionary [home, info]
19. diagonal: Webster's Revised Unabridged, 1913 Edition [home, info]
20. diagonal: Rhymezone [home, info]
21. diagonal, diagonal, diagonal: AllWords.com Multi-Lingual Dictionary [home, info]
22. diagonal: Webster's 1828 Dictionary [home, info]
23. Diagonal: 1911 edition of the Encyclopedia Britannica [home, info]
24. diagonal: Free Dictionary [home, info]
25. diagonal: Mnemonic Dictionary [home, info]
26. diagonal: WordNet 1.7 Vocabulary Helper [home, info]
27. diagonal: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. diagonal: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

29. diagonal: ArtLex Lexicon of Visual Art Terminology [home, info]

Business (3 matching dictionaries)

30. Diagonal: Construction Term Glossary [home, info]
31. Diagonal: Deardorff's Glossary of International Economics [home, info]
32. diagonal: Legal dictionary [home, info]

Computing (1 matching dictionary)

33. diagonal: Encyclopedia [home, info]

Medicine (1 matching dictionary)

34. diagonal: online medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

35. diagonal, diagonal: Wordcraft Dictionary [home, info]

Science (3 matching dictionaries)

36. Diagonal: Eric Weisstein's World of Mathematics [home, info]
37. diagonal: Botanical Terms [home, info]
38. diagonal: PlanetMath Encyclopedia [home, info]

Slang (1 matching dictionary)

39. diagonal: Urban Dictionary [home, info]

Sports (1 matching dictionary)

40. Diagonal: Chess Dictionary [home, info]

Tech (1 matching dictionary)

41. Diagonal: AUTOMOTIVE TERMS [home, info]

(Note: See diagonals for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (diagonal) ▸ noun:  (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry ▸ noun:  an oblique line of squares of the same color on a checkerboard ("The bishop moves on the diagonals") ▸ noun:  a line or cut across a fabric that is not at right angles to a side of the fabric ▸ noun:  (geometry) a straight line connecting any two vertices of a polygon that are not adjacent ▸ noun:  a punctuation mark (/) used to separate related items of information ▸ adjective:  at an angle; especially connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face ("A diagonal line across the page") ▸ adjective:  having an oblique or slanted direction ▸ Also see diagonals ▸ Word origin ▸ Words similar to diagonal ▸ Usage examples for diagonal ▸ Popular adjectives describing diagonal ▸ Popular nouns described by diagonal ▸ Words that often appear near diagonal ▸ Rhymes of diagonal ▸ Invented words related to diagonal