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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.

“There is this insane new piece of technology that is fundamentally going to rewire how we work. Some companies are going to make it, some companies are not,” Huang said.

From The Wall Street Journal • Apr. 14, 2026

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

From Barron's • Apr. 11, 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

What about a melty, fluffy egg that has an insane cheese pull?

From Salon • Mar. 21, 2026

What kind of insane revenge is there in exulting in his revulsion?

From "The Cruel Prince" by Holly Black

Vocabulary lists containing insane

salu, san (health)

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