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We found 31 dictionaries with English definitions that include the word treacherous:
Click on the first link on a line below to go directly to a page where "treacherous" is defined.

General (28 matching dictionaries)

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

Business (1 matching dictionary)

27. treacherous: Legal dictionary [home, info]

Computing (1 matching dictionary)

28. treacherous: Encyclopedia [home, info]

Slang (1 matching dictionary)

29. treacherous: Urban Dictionary [home, info]

(Note: See treacherousness for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (treacherous) ▸ adjective:  dangerously unstable and unpredictable ("Treacherous winding roads") ▸ adjective:  tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans ("The fiercest and most treacherous of foes") ▸ Also see treacherousness ▸ Words similar to treacherous ▸ Usage examples for treacherous ▸ Popular nouns described by treacherous ▸ Words that often appear near treacherous ▸ Rhymes of treacherous ▸ Invented words related to treacherous