insane

play
adjective in·sane \(ˌ)in-ˈsān\

Definition of insane

  1. 1a (1) :  exhibiting a severely disordered state of mind :  affected with mental illness (2) law :  affected with insanity (see insanity 2) <criminally insane>b :  unable to think in a clear or sensible way :  crazy <insane with jealousy> —not used technically

  2. 2 :  used by, typical of, or intended for mentally ill people <an insane asylum>

  3. 3 :  absurd <an insane scheme for making money>

  4. 4 :  extreme 1

insanely

adverb

insaneness

play \(ˌ)in-ˈsān-nəs\ noun

Examples of insane in a sentence

  1. The murderer was found to be criminally insane.

  2. She was insane with jealousy.

  3. He had an insane look in his eyes.

  4. She likes to drive at insane speeds.

  5. He had this insane idea that he could get rich by selling old computers.

Origin and Etymology of insane

Latin insanus, from in- + sanus sane


First Known Use: circa 1550



INSANE Defined for Kids

insane

play
adjective in·sane \in-ˈsān\

Definition of insane for Students

  1. 1 :  not normal or healthy in mind

  2. 2 :  used by or for people who are insane <an insane asylum>

  3. 3 :  very foolish or unreasonable

insanely

adverb

Medical Dictionary

insane

play
adjective in·sane \(ˈ)in-ˈsān\

Medical Definition of insane

  1. 1dated :  exhibiting a severely disordered state of mind

  2. 2:  used by, typical of, or intended for insane persons <an insane asylum>

insanely

adverb

Law Dictionary

insane

adjective in·sane

Legal Definition of insane

  1. :  affected with insanity



Seen and Heard

What made you want to look up insane? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to handle or deal with in a skillful way

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • m-ws-new-words-quiz
  • Which word means "inability to recognize faces"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ