Examples of “insane” in a Sentence

adj Suffering from serious mental illness; not of sound mind.

• He was declared legally insane and unfit to stand trial.
• In the old novel, the doctor decided the patient was insane and sent him away.
• The play tells the story of a woman who is wrongly called insane.

adj Extremely foolish, reckless, or impractical.

• It would be insane to quit your job with no savings.
• Driving in that storm is insane.
• Trying to cross that busy road without looking would be insane.

adj (informal) Extremely impressive, intense, or extraordinary.

• The view from the summit was insane.
• The band's last song was insane, and the whole crowd went wild.
• That goal was absolutely insane, and everyone jumped out of their seats.