Simple Definition of opener
: a tool, device, or machine that is used to open something
: the first game, performance, etc., in a series
Full Definition of opener
: one that opens <a bottle opener>: as a plural : cards of sufficient value for a player to open the betting in a poker game b : the first item, contest, or event of a series
: to begin with
Examples of opener
The album's opener is a slow love song.
First Known Use of opener
Seen and Heard
What made you want to look up opener? Please tell us where you read or heard it (including the quote, if possible).