The meaning of INSANE is exhibiting a severely disordered state of mind. How to use insane in a sentence.

INSANE definition: 1. very annoyed, angry, upset, or excited, often so that you cannot think or behave normally: 2…. Learn more.

Insane definition: (not in technical use as a medical diagnosis) not sane; not of sound mind; mentally deranged.. See examples of INSANE used in a sentence.

Define insane. insane synonyms, insane pronunciation, insane translation, English dictionary definition of insane. afflicted with mental derangement, having a disordered mind, mad: Her …

insane, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

To be insane is to have a seriously disordered state of mind. This is also a slang word for acting wacky or wild.

Oct 8, 2025 · (slang) Extremely good; incredibly amazing. quotations That guy is insane at FPS games.

Someone who is insane has a mind that does not work in a normal way, with the result that their behaviour is very strange.

WordReference Random House Unabridged Dictionary of American English © 2025 in•sane (in sān′), adj. not sane; not of sound mind; mentally deranged. of, pertaining to, or characteristic …

Synonyms for INSANE: mad, maniacal, maniac, crazy, mental, nuts, crazed, psycho; Antonyms of INSANE: sane, reasonable, sound, balanced, rational, clear, normal, wise