Read the dictionary definition of plug. All definitions for this word.
1. an old or over-worked horse
2. an upright hydrant for drawing water to use in fighting a fire
3. blockage consisting of an object designed to fill a hole tightly
4. an electrical device with two or three pins that is inserted in a socket to make an electrical connection
5. electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark
6. blatant or sensational promotion
7. a wad of something chewable as tobacco
8. insert as a plug
1. She plugged a cork in the wine bottle
9. insert a plug into
1. plug the wall
10. replace the center of a coin with a baser metal
1. plug a nickle
11. persist in working hard
1. Students must plug away at this problem
12. make a plug for; praise the qualities or in order to sell or promote
13. deliver a quick blow to
1. he punched me in the stomach
14. fill or close tightly with or as if with a plug
1. plug the hole
2. stop up the leak