What is the meaning of plug?

noun

• Blockage consisting of an object designed to fill a hole tightly.
  • synonyms: stopper, stopple
• A wad of something chewable as tobacco.
  • synonyms: chew, chaw, cud, quid, wad
• Blatant or sensational promotion.
  • synonyms: ballyhoo, hoopla, hype
• Electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark.
  • synonyms: spark plug, sparking plug
• An electrical device with two or three pins that is inserted in a socket to make an electrical connection.
  • synonyms: male plug
• An upright hydrant for drawing water to use in fighting a fire.
  • synonyms: fireplug, fire hydrant
• An old or over-worked horse.
  • synonyms: hack, jade, nag

verb

• Fill or close tightly with or as if with a plug.
  • usage: "plug the hole"; "stop up the leak"
  • synonyms: stop up, secure
• Persist in working hard.
  • usage: "Students must plug away at this problem"
  • synonyms: plug away
• Deliver a quick blow to.
  • usage: "he punched me in the stomach"
  • synonyms: punch
• Make a plug for; praise the qualities or in order to sell or promote.
• Insert a plug into.
  • usage: "plug the wall"
• Insert as a plug.
  • usage: "She plugged a cork in the wine bottle"