opener
n. countable B2 Upper Intermediate US //ˈoʊpənɝ// UK //ˈəʊpənɐ// open·er
n. the first thing that happens in a show, a game, or a conversation. You use this to start something and get people's attention.
n. the initial act, event, or remark in a sequence, such as a performance, sporting season, or social interaction. Often used to describe the first game of a tournament or the first song in a set.
The band played their biggest hit as the show opener.
The team lost their season opener, but they played much better in the second game of the month.
While the comedian's opener was met with stony silence, he managed to win the audience over by the middle of his routine with sharper observational humor.
From open + -er.
Usage
Commonly used in sports (season opener) and entertainment (show opener).