A person who operates a gun or cannon, especially in a military context. The gunner was responsible for aiming and firing the artillery during the battle.
A soldier trained to crew or service artillery pieces, machine-guns, or other mounted firearms, typically as part of an artillery or weapons unit. The gunners set up their howitzer on the ridge before dawn.
A player in a sport, especially football, who is known for their ability to shoot or score goals. The team's top gunner scored three goals in the match, leading them to victory.
In some armed forces, the lowest enlisted rank in the artillery branch, equivalent to private. After graduating from basic training he was appointed gunner in the Royal Artillery.
(US, slang) A highly competitive student, especially in medical or law school, who is excessively eager to excel and outshine peers. Group study sessions were stressful because there was always a gunner trying to answer every question first.