happening

happening
noun

an event or occurrence
（发生的）事情，事件
altogether it was an eerie happening.
总而言之，这是一件非常怪异的事情。
a partly improvised or spontaneous piece of theatrical or other artistic performance, typically involving audience participation
半即兴表演（一种自发的半即兴演出，常有观众参与）
a multimedia happening.
一次利用多媒体的即兴表演。

adjective

(informal)fashionable; trendy
(非正式)流行的，时髦的，时尚的
nightclubs for the young are the happening thing.
以年轻人为服务对象的夜总会是最近的时尚。