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An informal, and sometimes rude, word for someone acting in a crazy or very foolish way - "he drives like a lunatic." Historically, "lunatic" was an old, now outdated and offensive, medical term for someone with a serious mental illness. Today it's mostly used casually and dramatically, not as a medical term, but it can still sound harsh, so it's best used carefully.
（口語，有時冒犯）瘋子、瘋狂的人；舊時醫學用語（現已淘汰、具冒犯性）。
組成From Latin "luna" (moon) - people used to believe the moon's changes could cause madness.
同家族的字
- lunarshares the same root "luna," meaning moon
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
lunaticnoun/ˈluːnətɪk/
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An insane person.
- While there are other races (or individuals—heaven forgive me, I am no ethnologist) who think you a criminal or a lunatic unless you carefully plod along from step to step like a hippopotamus out of water.
- You may be right I may be crazy Oh, but it just may be a lunatic you're looking for
lunaticadj/luːˈnætɪk/
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Crazed, mad, insane, demented.
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rareliteraryRelating to the Moon; lunar.
- As the narrator turns his attention to the moon itself and its Lunatic inhabitants, Heinsius seems to draw on the True History, but is still within the confines of the Icaromenippus.
- That or I might bounce off something I hit and head back out into space, become the light in the eye of some lunatic observer, looking up at the big blue ball and seeing me bang something in their retina.
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rareliteraryInfluenced or affected by the Moon.
- This I remember: she was false as the lunatic sea.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。