plug

An object, such as a cork or a wad of cloth, used to fill a hole tightly; a stopper.

A dense mass of material that obstructs a passage.

A usually cylindrical or conic piece cut from something larger, often as a sample.

A fitting, commonly with two metal prongs for insertion in a fixed socket, used to connect an appliance to a power supply.

A spark plug.

A hydrant.

A flat cake of pressed or twisted tobacco.

A piece of chewing tobacco.