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We found 46 dictionaries with English definitions that include the word tautology:
Click on the first link on a line below to go directly to a page where "tautology" is defined.

General (31 matching dictionaries)

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

Art (6 matching dictionaries)

30. tautology: ArtLex Lexicon of Visual Art Terminology [home, info]
31. Tautology (Taut.), tautology: Dictionary of Philosophical Terms and Names [home, info]
32. Tautology: Glossary of English Grammar Terms [home, info]
33. Tautology: Glossary of Rhetorical Terms with Examples [home, info]
34. Tautology: Lexicon of Linguistics [home, info]
35. TAUTOLOGY: Bobs Byway OF POETIC TERMS [home, info]

Business (1 matching dictionary)

36. tautology: Legal dictionary [home, info]

Computing (2 matching dictionaries)

37. tautology: Free On-line Dictionary of Computing [home, info]
38. tautology: Encyclopedia [home, info]

Medicine (1 matching dictionary)

39. tautology: online medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

40. tautology: Wordcraft Dictionary [home, info]

Science (3 matching dictionaries)

41. Tautology: Eric Weisstein's World of Mathematics [home, info]
42. tautology: PlanetMath Encyclopedia [home, info]
43. tautology: FOLDOP - Free On Line Dictionary Of Philosophy [home, info]

Slang (1 matching dictionary)

44. tautology: Urban Dictionary [home, info]

(Note: See tautologies for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (tautology) ▸ noun:  useless repetition ("To say that something is `adequate enough' is a tautology") ▸ noun:  (logic) a statement that is necessarily true ("The statement `he is brave or he is not brave' is a tautology") ▸ Also see tautologies ▸ Word origin ▸ Words similar to tautology ▸ Usage examples for tautology ▸ Idioms related to tautology (New!) ▸ Popular adjectives describing tautology ▸ Words that often appear near tautology ▸ Rhymes of tautology ▸ Invented words related to tautology