Thesaurus.com
Dictionary.com
Showing results for insane. Search instead for insatsen.
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

Another added: "It would be insane to challenge the patient."

From BBC • Mar. 11, 2026

“That’d be insane to me,” says coach Travis Steele.

From The Wall Street Journal • Mar. 2, 2026

I never would’ve imagined that “perfect” Orange County could go so utterly insane.

From "Dry" by Neal Shusterman and Jarrod Shusterman

Vocabulary lists containing insane

salu, san (health)

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!