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We found 24 dictionaries with English definitions that include the word treasonous:
Click on the first link on a line below to go directly to a page where "treasonous" is defined.

General (22 matching dictionaries)

1. treasonous: Merriam-Webster.com [home, info]
2. treasonous: Oxford Dictionaries [home, info]
3. treasonous: Collins English Dictionary [home, info]
4. treasonous: Vocabulary.com [home, info]
5. Treasonous, treasonous: Wordnik [home, info]
6. treasonous: Cambridge Advanced Learner's Dictionary [home, info]
7. treasonous: Wiktionary [home, info]
8. treasonous: Webster's New World College Dictionary, 4th Ed. [home, info]
9. treasonous: Infoplease Dictionary [home, info]
10. treasonous: Dictionary.com [home, info]
11. treasonous: UltraLingua English Dictionary [home, info]
12. Treasonous: Wikipedia, the Free Encyclopedia [home, info]
13. Treasonous: Online Plain Text English Dictionary [home, info]
14. treasonous: Webster's Revised Unabridged, 1913 Edition [home, info]
15. treasonous: Rhymezone [home, info]
16. Treasonous: AllWords.com Multi-Lingual Dictionary [home, info]
17. treasonous: Webster's 1828 Dictionary [home, info]
18. treasonous: Free Dictionary [home, info]
19. treasonous: Mnemonic Dictionary [home, info]
20. treasonous: WordNet 1.7 Vocabulary Helper [home, info]
21. treasonous: LookWAYup Translating Dictionary/Thesaurus [home, info]
22. treasonous: Dictionary/thesaurus [home, info]

Business (1 matching dictionary)

23. treasonous: Legal dictionary [home, info]

Computing (1 matching dictionary)

24. treasonous: Encyclopedia [home, info]

Quick definitions from WordNet (treasonous) ▸ adjective:  constituting treason ▸ Words similar to treasonous ▸ Usage examples for treasonous ▸ Popular nouns described by treasonous ▸ Words that often appear near treasonous ▸ Rhymes of treasonous ▸ Invented words related to treasonous