[pluhg] 
noun, verb, plugged, plug⋅ging.| 1. | a piece of wood or other material used to stop up a hole or aperture, to fill a gap, or to act as a wedge. |
| 2. | a core or interior segment taken from a larger matrix. |
| 3. | Electricity. a device to which may be attached the conductors of a cord and which by insertion in a jack, or screwing into a receptacle, establishes contact. |
| 4. | spark plug (def. 1). |
| 5. | a fireplug or hydrant. |
| 6. | a cake of pressed tobacco. |
| 7. | a piece of tobacco cut off for chewing. |
| 8. | Informal. the favorable mention of something, as in a lecture, radio show, etc.; advertisement; recommendation: The actress was happy to give her new show a plug. |
| 9. | Angling. an artificial lure made of wood, plastic, or metal, and fitted with one or more gang hooks, used chiefly in casting. |
| 10. | Geology. neck (def. 14). |
| 11. | Slang. a worn-out or inferior horse. |
| 12. | Informal. a shopworn or unsalable article. |
| 13. | a small piece of sod used esp. for seeding a lawn. |
| 14. | a patch of scalp with viable hair follicles that is used as a graft for a bald part of the head. Compare hair transplant. |
| 15. | Slang. punch 1 (def. 1). |
| 16. | Metalworking.
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| 17. | Also called dook. a small piece of wood inserted into masonry as a hold for a nail. |
| 18. | Masonry. See under plug and feathers. |
| 19. | Also called plug hat. a man's tall silk hat. |
| 20. | to stop or fill with or as if with a plug (often fol. by up): to plug up a leak; plug a gap. |
| 21. | to insert or drive a plug into. |
| 22. | to secure with or as if with a plug. |
| 23. | to insert (something) as a plug. |
| 24. | to remove a core or a small plug-shaped piece from. |
| 25. | to remove the center of (a coin) and replace it with a baser metal: a plugged nickel. |
| 26. | Informal. to mention (something) favorably, as in a lecture, radio show, etc.: He says he will appear if he can plug his new TV series. |
| 27. | Slang. to punch with the fist. |
| 28. | Slang. to shoot or strike with a bullet. |
| 29. | to work with stubborn persistence (often fol. by along or away): You're doing a fine job—just keep plugging. Some writers will plug away at the same novel for several years. |
| 30. | Informal. to publicize insistently: Whenever he gets the chance, he's plugging for his company. |
| 31. | Slang. to shoot or fire shots. |
| 32. | plug in,
|
| 33. | plug into,
|
| 34. | plug up, to become plugged: The drain in the sink plugs up every so often. |
| 35. | pull the plug on, Informal.
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plug (plŭg)
n.
A dense mass of material filling a hole or closing an orifice. v. plugged, plug·ging, plugs
To fill tightly with a plug.