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We found 34 dictionaries with English definitions that include the word deadly:
Click on the first link on a line below to go directly to a page where "deadly" is defined.

General (28 matching dictionaries)

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

Business (2 matching dictionaries)

27. deadly: Glossary of Legal Terms [home, info]
28. deadly: Legal dictionary [home, info]

Computing (1 matching dictionary)

29. deadly: Encyclopedia [home, info]

Medicine (1 matching dictionary)

30. deadly: online medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

31. deadly: Idioms [home, info]

Slang (1 matching dictionary)

32. Deadly: Dublin Slang and Phrasebook [home, info]

(Note: See deadlys for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (deadly) ▸ adjective:  involving loss of divine grace or spiritual death ("The seven deadly sins") ▸ adjective:  extremely poisonous or injurious; producing venom ▸ adjective:  (of a disease) having a rapid course and violent effect ▸ adjective:  causing or capable of causing death ("A deadly enemy") ▸ adjective:  of an instrument of certain death ("Deadly poisons") ▸ adjective:  exceedingly harmful ▸ adverb:  as if produced by death ("Deadly pale") ▸ adverb:  as if dead ▸ adverb:  (used as intensives) extremely ("Deadly dull") ▸ Also see deadlys ▸ Words similar to deadly ▸ Usage examples for deadly ▸ Idioms related to deadly (New!) ▸ Popular nouns described by deadly ▸ Words that often appear near deadly ▸ Rhymes of deadly ▸ Invented words related to deadly