verb · the first issue or release of a product, publication, or currency

这款新款手机今日在上海举行了全球首发。

verb · the first public showing, screening, or performance of a movie, play, or artistic work

这部新话剧的首发演出吸引了成千上万的观众。

verb · in sports, a player who is selected to be in the starting lineup at the beginning of a game.

明天的首发投手是谁？