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We found 40 dictionaries with English definitions that include the word irrational:
Click on the first link on a line below to go directly to a page where "irrational" is defined.

General (30 matching dictionaries)

1. irrational: Merriam-Webster.com [home, info]
2. irrational: Oxford Dictionaries [home, info]
3. irrational: American Heritage Dictionary of the English Language [home, info]
4. irrational: Collins English Dictionary [home, info]
5. irrational: Vocabulary.com [home, info]
6. irrational: Macmillan Dictionary [home, info]
7. Irrational, irrational: Wordnik [home, info]
8. irrational: Cambridge Advanced Learner's Dictionary [home, info]
9. irrational: Wiktionary [home, info]
10. irrational: Webster's New World College Dictionary, 4th Ed. [home, info]
11. irrational: V2 Vocabulary Building Dictionary [home, info]
12. irrational: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. irrational: Infoplease Dictionary [home, info]
14. irrational: Dictionary.com [home, info]
15. irrational: Online Etymology Dictionary [home, info]
16. irrational: UltraLingua English Dictionary [home, info]
17. irrational: Cambridge Dictionary of American English [home, info]
18. Irrational: Wikipedia, the Free Encyclopedia [home, info]
19. Irrational: Online Plain Text English Dictionary [home, info]
20. irrational: Webster's Revised Unabridged, 1913 Edition [home, info]
21. irrational: Rhymezone [home, info]
22. irrational, irrational: AllWords.com Multi-Lingual Dictionary [home, info]
23. irrational: Webster's 1828 Dictionary [home, info]
24. irrational: Free Dictionary [home, info]
25. irrational: Mnemonic Dictionary [home, info]
26. irrational: WordNet 1.7 Vocabulary Helper [home, info]
27. irrational: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. irrational: Dictionary/thesaurus [home, info]

Business (2 matching dictionaries)

29. irrational: Glossary of Legal Terms [home, info]
30. irrational: Legal dictionary [home, info]

Computing (1 matching dictionary)

31. irrational: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

32. irrational: online medical dictionary [home, info]
33. irrational: Medical dictionary [home, info]

Religion (1 matching dictionary)

34. IRRATIONAL: Irivng Hexham's Concise Dictionary of Religion [home, info]

Science (3 matching dictionaries)

35. irrational: MATH SPOKEN HERE! [home, info]
36. irrational: PlanetMath Encyclopedia [home, info]
37. irrational, irrational: Prime [home, info]

Slang (1 matching dictionary)

38. Irrational: Urban Dictionary [home, info]

(Note: See irrationals for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (irrational) ▸ adjective:  not consistent with or using reason ("Irrational fears") ▸ adjective:  real but not expressible as the quotient of two integers ("Irrational numbers") ▸ Also see irrationals ▸ Word origin ▸ Words similar to irrational ▸ Usage examples for irrational ▸ Popular nouns described by irrational ▸ Words that often appear near irrational ▸ Rhymes of irrational ▸ Invented words related to irrational