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We found 47 dictionaries with English definitions that include the word insomnia:
Click on the first link on a line below to go directly to a page where "insomnia" is defined.

General (29 matching dictionaries)

1. insomnia: Wikimedia Commons US English Pronunciations [home, info]
2. insomnia: Dictionary/thesaurus [home, info]
3. insomnia: LookWAYup Translating Dictionary/Thesaurus [home, info]
4. insomnia: WordNet 1.7 Vocabulary Helper [home, info]
5. insomnia: Mnemonic Dictionary [home, info]
6. insomnia: Free Dictionary [home, info]
7. insomnia: AllWords.com Multi-Lingual Dictionary [home, info]
8. insomnia: Rhymezone [home, info]
9. insomnia: Webster's Revised Unabridged, 1913 Edition [home, info]
10. Insomnia: Online Plain Text English Dictionary [home, info]
11. Insomnia, Insomnia (soundtrack), Insomnia (song), Insomnia (single), Insomnia (novel), Insomnia (film), Insomnia (disambiguation), Insomnia (composition), Insomnia (band), Insomnia (album), Insomnia (The Hiatus EP), Insomnia (Hed PE album), Insomnia (Faithless song), Insomnia (Erick Sermon album), Insomnia (Daya song), Insomnia (Craig David song): Wikipedia, the Free Encyclopedia [home, info]
12. insomnia: Cambridge Dictionary of American English [home, info]
13. insomnia: UltraLingua English Dictionary [home, info]
14. insomnia: Online Etymology Dictionary [home, info]
15. insomnia: Dictionary.com [home, info]
16. insomnia: Infoplease Dictionary [home, info]
17. insomnia: The Wordsmyth English Dictionary-Thesaurus [home, info]
18. insomnia: Webster's New World College Dictionary, 4th Ed. [home, info]
19. insomnia: Wiktionary [home, info]
20. insomnia: Cambridge Advanced Learner's Dictionary [home, info]
21. insomnia, Insomnia: Wordnik [home, info]
22. insomnia: Macmillan Dictionary [home, info]
23. insomnia: Vocabulary.com [home, info]
24. insomnia: Collins English Dictionary [home, info]
25. insomnia: American Heritage Dictionary of the English Language [home, info]
26. insomnia: Oxford Dictionaries [home, info]
27. insomnia: Merriam-Webster.com [home, info]

Business (1 matching dictionary)

28. insomnia: Financial dictionary [home, info]

Computing (1 matching dictionary)

29. insomnia: Encyclopedia [home, info]

Medicine (16 matching dictionaries)

30. insomnia: Hyperdictionary [home, info]
31. Insomnia: Drug Medical Dictionary [home, info]
32. Insomnia: WeMove Glossary of Terms [home, info]
33. Insomnia: University of Maryland Glossary of Medical Terms [home, info]
34. Insomnia: Rudy's List of Archaic Medical Terms [home, info]
35. insomnia: Medical dictionary [home, info]
36. Insomnia: Sleep Terms [home, info]
37. insomnia: Glossary of HIV/AIDS Related Terms [home, info]
38. insomnia: Terms in the field of Psychiatry and Neurology [home, info]
39. insomnia: Dictionary of Cancer Terms [home, info]
40. insomnia: online medical dictionary [home, info]
41. insomnia: Chronic Fatigue Syndrome [home, info]
42. Insomnia: Merck Manuals [home, info]
43. insomnia: Chronic Fatigue Syndrome Glossary [home, info]
44. insomnia: Breast Cancer Talking Dictionary [home, info]
45. Insomnia: MedTerms.com Medical Dictionary [home, info]

(Note: See insomnias for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (insomnia) ▸ noun:  an inability to sleep; chronic sleeplessness ▸ Also see insomnias ▸ Word origin ▸ Words similar to insomnia ▸ Usage examples for insomnia ▸ Popular adjectives describing insomnia ▸ Words that often appear near insomnia ▸ Rhymes of insomnia ▸ Invented words related to insomnia