opener: Meaning and Definition of

o•pen•er

1. a person or thing that opens.
2. a device for opening sealed containers: can opener.
3. the first of several theatrical numbers, variety acts, sports events, etc.: a humorous monologue as an opener.
4. cards in a hand, as a pair of jacks or better, that according to a given standard are worth enough to enable the holder to make the first bet of a deal.
5. as an initially stated reason or argument; at the outset; to begin with: Well, for openers, I don't have the money.