lunacy/ˈlu:nəsɪ; `lunəsɪ/ n[U]1 unsoundness of mind; insanity; madness 精神错乱; 精神失常; 疯狂.2 very foolish behaviour 极愚蠢的行为 It's sheer lunacy driving in this weather. 天气这麽坏还开车, 简直是疯了.3 [C usu pl 通常作复数]mad or foolish act 疯狂的或愚蠢的行动.
牛津英汉双解词典