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

That’s an insane opinion to have,’” he remembers reading.

From Los Angeles Times • Apr. 23, 2026

Grieving is also time to get angry and justified in your own insane behavior.

From Slate • Apr. 23, 2026

She smacked her back on a rock and had "insane" pressure across her back that was spreading into her stomach.

From BBC • Apr. 18, 2026

“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

To shriek like an insane woman who has been locked in an attic for a great many years, you have to practice.

From "Okay for Now" by Gary D. Schmidt

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!