1 an expression of extreme fear, excitement or anger that makes sb lose control of his/her emotions 歇斯底里的状态（因极其恐惧、激动或愤怒而情绪失控）: She went into hysterics when they told her the news. 他们告诉她这个消息时，她就陷入歇斯底里了。 (informal 非正式) My father would have hysterics (= be furious) if he knew I was going out with you. 我爸爸要是知道我跟你相好，一定会大发雷霆。

2 (informal 非正式) laughter that you cannot control 狂笑: The comedian had the audience in hysterics. 那位喜剧演员逗得观众笑个不停。