noun open·er \ˈōp-nər, ˈō-pə-\

: 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
for openers
:  to begin with

Examples of OPENER

  1. The album's opener is a slow love song.

First Known Use of OPENER

15th century


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