Definition of "gunner"

(military) An artillery soldier, especially one who holds private rank.

A person who operates a gun.  examples

(figuratively) An excessive go-getter; one exhibiting over-ambition.  examples

(American football) A player on the kicking team whose primary job is to tackle the kickoff returner or punt returner.  examples

(UK, slang, soccer) A fan of the Arsenal Football Club.

The great northern diver or loon.  examples

(UK, Ireland, dialect) The sea bream, especially Pagellus bogaraveo (blackspot sea bream)  examples

(basketball) A player who can reliably shoot baskets.  examples

(rare) Alternative spelling of gonna

(regional, Cebu, slang) The person designated to pour drinks in a drinking session.