1. plural of insanity; instances of extreme foolishness or irrationality
2. plural of insanity; cases of severe mental illness or disorder
Usage: medical; formal

Examples

• The financial insanities of the past decade led to economic collapse.
• He couldn’t understand the insanities of modern politics.
• The court examined several cases involving legal insanities.
• These traffic laws seem like complete insanities to most drivers.
• The documentary explored historical insanities in medical treatment.
• She witnessed the insanities of war firsthand as a journalist.