- (a.) Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc.
- (a.) Used by or appropriated to, insane persons; as, an insane hospital.
- (a.) Exhibiting unsoundness or disorded of mind; not sane; mad; deranged in mind; delirious; distracted. See Insanity, 2.
- (a.) Causing insanity or madness.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). insane. Retrieved September 22, 2026, from http://smartdefine.org/insane/definitions/2022042 |
| Chicago | Webster's. 2011. "insane" http://smartdefine.org/insane/definitions/2022042 (accessed September 22, 2026). |
| Harvard | Webster's 2011, insane, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/insane/definitions/2022042>. |
| MLA | Webster's. "insane" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/insane/definitions/2022042> |