insanities Definition

1. The state of being insane.

Thesaurus: mental illness, derangement, mental aberration, madness, dementia, lunacy, psychosis, neurosis, phobia, mania, alienation.
2. Extreme folly or stupidity, or an instance of this.

Thesaurus: folly, oddity, idiosyncrasy, eccentricity.
3. law.
The state or condition of having a mental illness so severe that the affected individual cannot be held responsible for their actions under law.