Related topics: Sport
the first of a series of games in a sports competition:
They are hoping to win tomorrow's opener against New Zealand.
a) British English
as a beginning or first stage:
For openers, the band played a couple of old Beatles songs.
b) American English
used to give one reason, explanation etc for something, although there are others you might mention later too:
It's tough being a reporter. For openers, there are the long hours.