Dictionary Check: plug

blockage consisting of an object designed to fill a hole tightly

a wad of something chewable as tobacco

blatant or sensational promotion

electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark

an electrical device with two or three pins that is inserted in a socket to make an electrical connection

an upright hydrant for drawing water to use in fighting a fire