Lunatic | Mean of lunatic in English Dictionary

/ˈluːnəˌtɪk/

• Noun
• an insane person
1. a murderous lunatic
2. He was raving like a lunatic.
• a person who behaves in a very foolish way
1. I almost got into an accident with some lunatic on the highway.
2. My boss is a complete lunatic.
3. He was a lunatic out on the ski slopes. [=he was an extremely daring, reckless, or aggressive skier]
• designed for insane people
1. a lunatic asylum

• not sane
1. a lunatic [=crazy] genius
• wildly foolish
1. He hatched a lunatic plot to overthrow the government.
2. another of his lunatic ideas
3. lunatic behavior
4. a lunatic risk