Insane definition

ĭn-sān
Having been determined to be in a condition that meets the legal definition of insanity.
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Of or for insane people.

An insane asylum.

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3
Immoderate; wild.

Insane jealousy.

adjective
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3
Not sane; mentally ill or deranged; demented; mad.
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3
The definition of insane is someone who acts or speaks strangely because their brain isn’t working correctly.

An example of insane is a person who goes shopping without any pants on.

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Causing insanity or madness.
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Very foolish; absurd.

Took insane risks behind the wheel.

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Of, exhibiting, or afflicted with mental derangement. Not used in psychiatric diagnosis.
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Characteristic of or associated with persons who are mentally deranged.

An insane laugh; insane babbling.

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Intended for use by such persons.

An insane asylum.

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Insane is defined as very foolish or senseless behavior.

An example of insane is a person who goes on an expensive vacation after just losing a job.

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Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.
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Used by, or appropriated to, insane persons; as, an insane hospital.
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1
Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc.
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(informal) Very foolish, excessive, fantastic, etc.
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Origin of insane

  • Latin īnsānus in- not in–1 sānus sane, healthy

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin īnsānus (“unsound in mind; mad, insane”), from in- + sānus (“sound, sane”).

    From Wiktionary