plug

1. A pronged connecting device which fits into a mating socket, especially an electrical one. · I pushed the plug back into the electrical socket and the lamp began to glow again.
2. An electric socket: wall plug.
3. Any piece of wood, metal, or other substance used to stop or fill a hole. · Pull the plug out of the tub so it can drain.
4. A flat oblong cake of cured and pressed tobacco; the tobacco that constitutes it. (US, countable, uncountable) · Near-synonym: chewing tobacco· He preferred a plug to snuff.
5. A high, tapering silk hat. (US, slang)
6. A worthless horse. (US, slang) · That sorry old plug is ready for the glue factory!
7. Any worn-out or useless article. (dated)
8. A book that fails to sell. (dated, slang)

Plural plugs