We found 29 dictionaries that define the word treacherous:

General (25 matching dictionaries)

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

Business (1 matching dictionary)

24. treacherous: Legal dictionary

Computing (1 matching dictionary)

25. treacherous: Encyclopedia

Slang (2 matching dictionaries)

26. treacherous: Green’s Dictionary of Slang
27. treacherous: Urban Dictionary

(Note: See treacherously as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Exhibiting treachery. ▸ adjective:  Deceitful; inclined to betray. ▸ adjective:  Unreliable; dangerous. Similar: dangerous, perfidious, unsafe, unfaithful, unreliable, Punic, traitorish, treasonish, backstabby, sneaky, more... Opposite: trustworthy, reliable, loyal, faithful, dependable Types: dangerous, perilous, risky, hazardous, unpredictable, insecure, unsafe, more... Phrases: The Treacherous, Treacherous Three, opposite of treacherous, not quite treacherous, cunning or treacherous, more... Colors:     dark red,     blood red,     crimson,     maroon,     burgundy,     black,     charcoal,     midnight blue,     forest green,     olive green ▸ Words similar to treacherous ▸ Usage examples for treacherous ▸ Idioms related to treacherous ▸ Wikipedia articles (New!) ▸ Popular nouns described by treacherous ▸ Words that often appear near treacherous ▸ Rhymes of treacherous ▸ Invented words related to treacherous