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

General (31 matching dictionaries)

1. ominous: Merriam-Webster.com [home, info]
2. ominous: Oxford Dictionaries [home, info]
3. ominous: American Heritage Dictionary of the English Language [home, info]
4. ominous: Collins English Dictionary [home, info]
5. ominous: Vocabulary.com [home, info]
6. ominous: Macmillan Dictionary [home, info]
7. Ominous, ominous: Wordnik [home, info]
8. ominous: Cambridge Advanced Learner's Dictionary [home, info]
9. ominous: Wiktionary [home, info]
10. ominous: Webster's New World College Dictionary, 4th Ed. [home, info]
11. ominous: V2 Vocabulary Building Dictionary [home, info]
12. ominous: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. ominous: Infoplease Dictionary [home, info]
14. Ominous, ominous: Dictionary.com [home, info]
15. ominous: Online Etymology Dictionary [home, info]
16. ominous: UltraLingua English Dictionary [home, info]
17. ominous: Cambridge Dictionary of American English [home, info]
18. Ominous: Wikipedia, the Free Encyclopedia [home, info]
19. Ominous: Online Plain Text English Dictionary [home, info]
20. ominous: Webster's Revised Unabridged, 1913 Edition [home, info]
21. ominous: Rhymezone [home, info]
22. ominous: AllWords.com Multi-Lingual Dictionary [home, info]
23. ominous: Webster's 1828 Dictionary [home, info]
24. ominous: Free Dictionary [home, info]
25. ominous: Mnemonic Dictionary [home, info]
26. ominous: WordNet 1.7 Vocabulary Helper [home, info]
27. ominous: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. Ominous: The Word Detective [home, info]
29. ominous: Dictionary/thesaurus [home, info]

Business (1 matching dictionary)

30. ominous: Legal dictionary [home, info]

Medicine (1 matching dictionary)

31. ominous: online medical dictionary [home, info]

Slang (1 matching dictionary)

32. ominous: Urban Dictionary [home, info]

(Note: See ominousness for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (ominous) ▸ adjective:  presaging ill-fortune ("A dead and ominous silence prevailed") ▸ adjective:  threatening or foreshadowing evil or tragic developments ("Ominous rumblings of discontent") ▸ Also see ominousness ▸ Word origin ▸ Words similar to ominous ▸ Usage examples for ominous ▸ Popular nouns described by ominous ▸ Words that often appear near ominous ▸ Rhymes of ominous ▸ Invented words related to ominous