Pronunciation: (ō'pu-nur),[key] —n. 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. openers,Poker.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. for openers, as an initially stated reason or argument; at the outset; to begin with: Well, for openers, I don't have the money.