·adj Causing insanity or madness.
II. Insane ·adj Used by, or appropriated to, insane persons; as, an insane hospital.
III. Insane ·adj Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, ·etc.
IV. Insane ·adj Exhibiting unsoundness or disorded of mind; not sane; mad; deranged in mind; delirious; distracted. ·see Insanity, 2.