- behaviour that is stupid or crazy愚蠢的行为;疯狂 synonym madness
- It's sheer lunacy driving in such weather.天气这样糟糕还开车,真是疯了。
- a comedy show full of inspired lunacy充满精神错乱的喜剧表演
- (old-fashioned) mental illness精神病;精神错乱;精神失常 synonym madness
Word Originmid 16th cent. (originally referring to intermittent insanity believed to be caused by changes of the moon): from lunatic + -acy.