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.
If you describe a decision or action as insane, you think it is very foolish or excessive.
insane (informal) having a mind that does not work normally: If I have to stay any longer, I'll go insane. Insane is also used as a legal term for someone who is not responsible for a crime they have committed because they were not able to know right from wrong at the time.
Define insane. insane synonyms, insane pronunciation, insane translation, English dictionary definition of insane. afflicted with mental derangement, having a disordered mind, mad: Her bizarre threats were the result of an insane jealousy.
insane, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary
insane, adj. & n. meanings, etymology and more | Oxford English Dictionary
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 of a person who is mentally deranged: insane actions; an insane asylum. utterly senseless: an insane plan.