Definitions
1.nounA person who opens something.
2.nounA device that opens something; specifically a tin-opener/can-opener, or a bottle opener.
3.noun(in combination) An establishment that opens."The late-night openers in the mall include two restaurants and a clothing store."
4.nounThe player who starts the betting.
5.noun(in the plural) Cards of sufficient value to enable a player to open the betting.
6.nounA person employed to separate sheets of hot metal that become stuck together.
7.nounThe first act in a variety show or concert.
8.nounA batsman who normally plays in the first two positions of an innings.
9.nounThe first in a series of events, items etc.; the first remark or sentence of a conversation.
10.nounThe first game played in a competition.
11.nounThe first goal or point scored.
12.nounA period of time when it is legal to commercially fish.