plug

What is the Definition of plug?

Noun:

1. blockage consisting of an object designed to fill a hole tightly
2. a wad of something chewable as tobacco
3. blatant or sensational promotion
4. electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark
5. an electrical device with two or three pins that is inserted in a socket to make an electrical connection
6. an upright hydrant for drawing water to use in fighting a fire
7. an old or over-worked horse

Verb:

1. fill or close tightly with or as if with a plug
2. persist in working hard
3. deliver a quick blow to
4. make a plug for; praise the qualities or in order to sell or promote
5. replace the center of a coin with a baser metal
6. insert a plug into
7. insert as a plug

Other meanings of plug (synonyms, cognates).