Insane | Mean of insane in English Dictionary

/ɪnˈseɪn/

• not sane: such as
• having or showing severe mental illness
1. an insane person
2. The murderer was found to be criminally insane.
• unable to think in a clear or sensible way
1. She was insane with jealousy/anger.

• wild and uncontrolled
1. He had an insane look in his eyes.
• very foolish or unreasonable
1. She likes to drive at insane speeds.
2. He had this insane idea that he could get rich by selling old computers.
• used for people who have severe mental illnesses
1. an insane asylum [=(now more commonly) a mental hospital]
• to become mentally ill
1. She went insane and started thinking that everyone was trying to kill her.
2. I must be going insane. I can't find my car keys anywhere.
3. If you don't stop making that noise, I'm going to go (completely) insane!
• insane people
1. a hospital for the insane [=(now more commonly) the mentally ill]