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

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.

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

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

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

Dec 26, 2025 · Adjective insane (comparative more insane or insaner, superlative most insane or insanest) Exhibiting unsoundness or disorder of mind; not sane; utterly mad. Synonyms: see …

INSANE meaning: 1 : not sane: such as; 2 : having or showing severe mental illness

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