Usually means: Severe mental illness, impaired reasoning.
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We found 37 dictionaries that define the word insane:

General (26 matching dictionaries)
  1. insane, the insane: Merriam-Webster.com
  2. insane: Oxford Learner's Dictionaries
  3. insane: American Heritage Dictionary of the English Language
  4. insane: Collins English Dictionary
  5. insane: Vocabulary.com
  6. Insane, insane: Wordnik
  7. insane, the insane: Cambridge Advanced Learner's Dictionary
  8. insane: Wiktionary
  9. insane: Webster's New World College Dictionary, 4th Ed.
  10. insane: The Wordsmyth English Dictionary-Thesaurus
  11. insane: Infoplease Dictionary
  12. insane: Dictionary.com
  13. insane: Online Etymology Dictionary
  14. insane: Cambridge Essential American English Dictionary
  15. INSANE (engine), INSANE (software), Insane (Texas song), Insane (cancelled video game), Insane (film), Insane (video game), Insane: Wikipedia, the Free Encyclopedia
  16. Insane: Online Plain Text English Dictionary
  17. insane: Webster's Revised Unabridged, 1913 Edition
  18. insane: Rhymezone
  19. insane: AllWords.com Multi-Lingual Dictionary
  20. insane: Webster's 1828 Dictionary
  21. insane: Free Dictionary
  22. insane: Mnemonic Dictionary
  23. insane: LookWAYup Translating Dictionary/Thesaurus
  24. insane: Dictionary/thesaurus

Art (1 matching dictionary)
  1. Shakespeare Glossary (No longer online)

Business (3 matching dictionaries)
  1. Glossary of Legal Terms (No longer online)
  2. Bouvier's Law Dictionary 1856 Edition (No longer online)
  3. insane: Legal dictionary

Computing (1 matching dictionary)
  1. insane: Encyclopedia

Medicine (3 matching dictionaries)
  1. online medical dictionary (No longer online)
  2. insane: Medical dictionary
  3. Rudy's List of Archaic Medical Terms (No longer online)

Miscellaneous (2 matching dictionaries)
  1. Sound-Alike Words (No longer online)
  2. insane: Idioms

Slang (1 matching dictionary)
  1. insane: Green’s Dictionary of Slang

(Note: See insanely as well.)

Definitions from Wiktionary (
)
American English Definition British English Definition
adjective:  Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
adjective:  Used by or relating to insane people.
adjective:  Causing insanity or madness.
adjective:  (informal) Characterized by excess or the utmost folly; ridiculous; impractical.
adjective:  (slang) Extremely good; incredibly amazing.

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Colors:
    neon green,     electric blue,     hot pink,     blood red,     psychedelic purple,     lime green,     shocking pink,     cobalt blue,     crimson,     magenta



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