adjective
- having a serious mental illness; not mentally sound
- extremely foolish or unreasonable
- extremely intense or extreme in degree
Usage: clinical/legal context
Usage: informal
Usage: informal
Examples
- The defendant was declared legally insane at the time of the crime.
- It would be insane to drive in this blizzard.
- The traffic during rush hour is absolutely insane.
- She thought his plan to quit his job without savings was insane.
- The concert was insane – the crowd went wild.
- The insane asylum was built in the 19th century.
- That’s an insane amount of homework for one night.