uncontrolled behaviour or crying, usually caused by extreme fear or sadness歇斯底里发作
Convinced the plane was about to crash, many people were sobbing and in hysterics.确信这架飞机即将坠毁之后,许多人都在哭泣并且变得歇斯底里。
informal uncontrolled laughter狂笑
He was hilarious - he had us all in hysterics.他可真滑稽——逗得我们大家狂笑不止。