What is the meaning of Opener?

A person who opens something.

A device that opens something; specifically a tin-opener/can-opener, or a bottle opener.

An establishment that opens.

The player who starts the betting.

Cards of sufficient value to enable a player to open the betting.

A person employed to separate sheets of hot metal that become stuck together.

The first act in a variety show or concert.

A batsman or bowler who normally plays in the first two positions of an innings.

The first in a series of events, items etc.; the first remark or sentence of a conversation.

The first game played in a competition.

The first goal or point scored.

A period of time when it is legal to commercially fish.

A pitcher who specializes in getting the first outs of a game before being replaced, either by a long reliever or a pitcher who would normally start.

comparative form of open: more open

Source: wiktionary.org