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 insaneb : 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.
Recent Examples of insane from the Web
Being the adventures of a small-time crook and ladiesaEU man who, after killing a pimp, spends time in an insane asylum, the Italian army, and a German concentration camp. 7:15 p.m. Saturday; 8:25 p.m. Sunday.
Capped of the tour with an insane after party back-to-back with Alex at PRYSM nightclub.
Displayed among the many historic photos that line the walls is an array of once popular treatments for people labeled criminally (or otherwise) insane.
The premise is insane and the story is bedeviled by unnecessary subplots.
The difference is that the world of Myst is eerie and haunting, and this one is insane.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'insane'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of insane
Latin insanus, from in- + sanus sane
First Known Use: circa 1550See Words from the same year
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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