Stopper

Stopper may refer to:


 * Bung, a plug used to stop the opening of a container
 * Laboratory rubber stopper, a specific type of bung
 * Plug (sanitation), used to stop a drainage outlet
 * Defender (association football), in soccer (association football)
 * Milkor 37/38mm and 40mm Stopper, a gun
 * Alternative name for a whitewater hole, in whitewater kayaking
 * A local train that calls at almost every station, including very small ones
 * Stopper, in the game of bridge
 * Stopper, in baseball, a key starting or relief pitcher
 * Slang for stopwatch, a handheld timepiece designed to measure the amount of time
 * Stopper knot, a type of a knot at the end of the rope
 * Stopper, a common name for some plant species in the genus Eugenia