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 bizarre threats …

If you describe a decision or action as insane, you think it is very foolish or excessive.

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 …

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

5 days ago · (slang) Extremely good; incredibly amazing. quotations That guy is insane at FPS games.

Insane definition: Having been determined to be in a condition that meets the legal definition of insanity.

Definition of insane adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.