Definition of insane
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 : used by, typical of, or intended for mentally ill people <an insane asylum>
3 : absurd <an insane scheme for making money>
4 : extreme 1
insanenessplay \(ˌ)in-ˈsān-nəs\ noun
Examples of insane in a sentence
The murderer was found to be criminally insane.
She was insane with jealousy.
He had an insane look in his eyes.
She likes to drive at insane speeds.
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
Definition of insane for Students
1 : not normal or healthy in mind
2 : used by or for people who are insane <an insane asylum>
3 : very foolish or unreasonable
Medical Definition of insane
1dated : exhibiting a severely disordered state of mind
2: used by, typical of, or intended for insane persons <an insane asylum>
Legal Definition of insane
: affected with insanity
Seen and Heard
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