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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.

“It’s pretty insane to watch a room full of industry people rush the stage,” said Emily Cohen Belote, the global head of country programming at Amazon Music, who was in the crowd.

From The Wall Street Journal • Apr. 13, 2026

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

From Barron's • Apr. 11, 2026

She said: "Three decades is absolutely insane, to the point where I am literally riddled with endometriosis."

From BBC • Mar. 23, 2026

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

From Salon • Mar. 21, 2026

It is doubtful if any father ever was more insane about an offspring.

From "Cheaper by the Dozen" by Frank B. Gilbreth Jr. and Ernestine Gilbreth Carey

Vocabulary lists containing insane

salu, san (health)

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