Definitions

1. adjective

extremely foolish or unreasonable; completely crazy

“He was considered insane for buying a yacht on a teacher’s salary.”

2. adjective

mentally ill or deranged

“The court ordered the insane man to be committed to a psychiatric hospital.”

3. verb

to drive someone crazy or make them become insane

“The workload was driving her insane, so she quit her job.”

4. noun

a state of extreme madness or irrationality

“Her insanity led to her making foolish decisions.”

5. noun

a person who is mentally ill or deranged

“The insane asylum was a place where patients with mental illnesses received treatment.”