insanity
/ɪnˈsænɪti/
noun
- A state of severe mental illness that prevents someone from understanding reality or behaving rationally.
- Her family struggled to cope with her gradual descent into insanity.
- The court found him not guilty by reason of insanity.
- For centuries, people with insanity were often locked away in asylums.
- Extreme foolishness or irrational behavior.
- It would be sheer insanity to drive through the floodwaters.
- Spending your entire savings on lottery tickets is financial insanity.
- The plan to climb the mountain in a blizzard was pure insanity.