A person (especially a male) who débuts, or appears for the first time.
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.
The first act in a variety show or concert.
The first goal or point scored.
A period of time when it is legal to commercially fish.
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.
A batsman who normally plays in the first two positions of an innings.
The first game played in a competition.
The first in a series of events, items etc.; the first remark or sentence of a conversation.
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.