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Definitions

insane

[in-seyn] / ɪnˈseɪn /
ADJECTIVE
mad
Synonyms
STRONGEST
crazy delirious demented deranged frantic frenzied kooky nutty
WEAK
aberrant bananas batty crazed cuckoo daft frenetic loony lunatic non compos mentis of unsound mind off one's rocker out of one's mind raving unbalanced unhinged unsound unstable
Antonyms
STRONGEST
balanced calm collected rational reasonable sane sensible wise
WEAK
OK sound unenthusiastic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Shipping costs are up, too, Ferreri said, describing "insane" prices for the delivery of essential farm equipment.

From Barron's • Apr. 11, 2026

He said that people have offered him insane amounts of money for Coachella.

From Los Angeles Times • Apr. 10, 2026

Bryony Coles, from Belfast said it was "truly insane" to find out a photoshoot she had organised with Derry Girls actor Saoirse-Monica Jackson would feature in Vogue.

From BBC • Mar. 26, 2026

Tracy has had an insane career but also an insane life, like the accident and coming back from that.

From The Wall Street Journal • Mar. 2, 2026

“So he was religious. Everybody was insane but me. He wouldn’t take any amount of money.”

From "Everything Sad Is Untrue" by Daniel Nayeri

Vocabulary lists containing insane

salu, san (health)

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