plug

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An object, such as a cork or a wad of cloth, used to fill a hole tightly; a stopper.
2. n. A dense mass of material that obstructs a passage.
3. n. A usually cylindrical or conic piece cut from something larger, often as a sample.
4. n. Electricity A fitting, commonly with two metal prongs for insertion in a fixed socket, used to connect an appliance to a power supply.
5. n. Electricity A spark plug.
6. n. A hydrant.
7. n. A flat cake of pressed or twisted tobacco.
8. n. A piece of chewing tobacco.
9. n. Geology A mass of igneous rock filling the vent of a volcano.
10. n. Informal A favorable public mention of a commercial product, business, or performance, especially when broadcast.
11. n. Slang Something inferior, useless, or defective, especially an old, worn-out horse.
12. n. Slang A gunshot or bullet: a plug in the back.
13. n. A lure to which hooks are attached, used especially in angling.
14. v. To fill (a hole) tightly with or as if with a plug; stop up.
15. v. To insert (something) as a plug: plugged a cork in the bottle.
16. v. Slang To hit with a bullet; shoot.
17. v. Slang To hit with the fist; punch.
18. v. Informal To publicize (a product, for example) favorably, as by mentioning on a broadcast: authors who plug their latest books on TV talk shows.
19. v. To become stopped up or obstructed: a gutter that plugged up with leaves.
20. v. Informal To work doggedly and persistently: "You may plug along fifty years before you get anywhere” ( Saul Bellow).
21. plug in To connect (an appliance) to an electrical outlet.
22. plug in To function by being connected to an electrical outlet: a power drill that plugs in.
23. plug into To connect or be connected to in the manner of an electrical appliance: The local system is plugged into the national telephone network. This computer plugs into a data bank.
24. plug into Slang To cause to be closely attuned or responsive to: connoisseurs who are plugged into the current art scene.

Century Dictionary and Cyclopedia

1. n. A piece of wood or other substance, usually in the form of peg or cork, used to stop a hole in a vessel; a stopple; a bung or stopper of any kind.
2. n. A peg, wedge, or other appliance driven in, or used to stop a hole or fill a gap. , A piece of wood driven horizontally into a wall, its end being then sawed away flush with the wall, to aiford a hold for nails
3. n. A wedge-pin forced between a rail and its chair on a railway.
4. n. A spigot driven into place, as in a barrel, in contradistinction to one screwed in.
5. n. A wooden stopper fitted in the opening of the pump on a ship's deck during a storm, to protect the water-tanks against lightning; a pump-stopper.
6. n. A small piece of some substance, as metallic foil, used by a dentist to fill the cavity of a decayed tooth.
7. n. A branch pipe from a watermain, leading to a point where a hose can be conveniently attached, and closed by a cap or plug; a fire-plug.
8. n. In die-sinking, a cylindrical piece of soft steel the end of which is fitted to a matrix. When matrix and plug are forced together under heavy pressure, the intaglio design of the matrix is impressed in relief upon the plug. The plug is then hardened, and becomes a punch, which can be used to make impressions on die-faces, as for coining, etc.
9. n. A flat oblong cake of pressed tobacco.
10. n. A man's silk or dress hat; a plug-hat.
11. n. A worn, damaged, unfashionable, or otherwise injured article, which, by reason of its defects, has become undesirable, unsalable, or in a condition rendering it difficult to sell without a large reduction of its price, as a shelf-worn book, or an old horse worn down by hard work. Also old plug.
12. n. A short, thick-set person.
13. n. A workman who has served no regular apprenticeship.
14. n. A sort of fishing-boat.
15. n. Same as plug-rod
16. To stop with a plug; make tight by stopping a hole: as, to plug a decayed tooth; to plug a wound with lint.
17. To hit with a ball or bullet: as, to plug a buck with a rifle.
18. To cut out a plug from: said of watermelons when a tapering plug is cut out to see if the fruit is ripe, and then replaced.
19. n. In geology, a cylindrical mass of lava, a remnant of the last eruption from a volcanic vent, which chilled in the conduit and plugged it up. See neck, 6 , and stock, 35.
20. n. A book that does not sell at all.
21. n. In stone-cutting, a wedge which is driven into a hole that has been drilled in a stone for the purpose of splitting it. For large pieces of stone a series of holes is drilled and a wedge or plug driven into each.
22. n. In a steam-engine: A plug-rod; a plug-frame.
23. n. A safety-plug; a fusible plug inserted in a boiler and made of some alloy which will melt if the temperature of the metal plate of the shell rises above a certain point by reason of low water.
24. n. Same as peg, 7.

Wiktionary

1. n. electricity A pronged connecting device which fits into a mating socket.
2. n. Any piece of wood, metal, or other substance used to stop or fill a hole; a stopple.
3. n. US A flat oblong cake of pressed tobacco.
4. n. US, slang A high, tapering silk hat.
5. n. US, slang A worthless horse.
6. n. construction A block of wood let into a wall to afford a hold for nails.
7. n. A mention of a product (usually a book, film or play) in an interview, or an interview which features one or more of these.
8. n. geology A body of once molten rock that hardened in a volcanic vent. Usually round or oval in shape.
9. n. fishing A type of lure consisting of a rigid, buoyant or semi-buoyant body and one or more hooks.
10. v. transitive To stop with a plug; to make tight by stopping a hole.
11. v. transitive To blatantly mention a particular product or service as if advertising it.
12. v. intransitive (informal) To persist or continue with something.
13. v. transitive To shoot a bullet into something with a gun.
14. v. slang, transitive to have sex with, penetrate sexually.

GNU Webster's 1913

1. n. Any piece of wood, metal, or other substance used to stop or fill a hole; a stopple.
2. n. United States A flat oblong cake of pressed tobacco.
3. n. Slang, U.S. A high, tapering silk hat.
4. n. Slang, U.S. A worthless horse.
5. n. (Building) A block of wood let into a wall, to afford a hold for nails.
6. v. To stop with a plug; to make tight by stopping a hole.

WordNet 3.0

1. v. insert a plug into
2. n. an upright hydrant for drawing water to use in fighting a fire
3. n. an electrical device with two or three pins that is inserted in a socket to make an electrical connection
4. v. insert as a plug
5. n. an old or over-worked horse
6. v. persist in working hard
7. n. a wad of something chewable as tobacco
8. v. deliver a quick blow to
9. n. electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark
10. n. blockage consisting of an object designed to fill a hole tightly
11. v. make a plug for; praise the qualities or in order to sell or promote
12. v. fill or close tightly with or as if with a plug
13. n. blatant or sensational promotion