o·pen·er / ˈōp(ə)nər/ • n. 1. a device for opening something, esp. a container: a bottle opener| a letter opener.2. the first of a series of games, cultural events, etc.: the league opener is three weeks away. ∎ the first point or points scored in a sports event. ∎ a remark used as an excuse to initiate a conversation: we blurted out the obvious opener. ∎ Poker (openers) a hand of sufficient value to allow the opening of betting.PHRASES: for openers inf. to start with; first of all: for openers, the car is roomier than the old model.