Plug

Breech plug
(Gun.) in breech-loading guns, the metal plug or cylinder which closes the aperture in the breech, through which the gun is loaded.

Fire plug
a street hydrant to which hose may be attached.

Hawse plug
(Naut.) a plug to stop a hawse hole.

Plug and feather
(Stone Working) See Feather, n., 7.

Plug centerbit
a centerbit ending in a small cylinder instead of a point, so as to follow and enlarge a hole previously made, or to form a counterbore around it.

Plug rod
(Steam Eng.) , a rod attached to the beam for working the valves, as in the Cornish engine.

Plug valve
(Mech.) a tapering valve, which turns in a case like the plug of a faucet.

v. t.

To stop with a plug; to make tight by stopping a hole.

[imp. & p. p. Plugged ; p. pr. & vb. n. Plugging .]

Noun	1.	plug - blockage consisting of an object designed to fill a hole tightly Synonyms: stopper, stopple
	2.	plug - a wad of something chewable as tobacco Synonyms: chaw, chew, cud, wad, quid
	3.	plug - blatant or sensational promotion Synonyms: ballyhoo, hoopla, hype
	4.	plug - 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
	5.	plug - an electrical device with two or three pins that is inserted in a socket to make an electrical connection Synonyms: male plug
	6.	plug - an upright hydrant for drawing water to use in fighting a fire Synonyms: fire hydrant, fireplug
	7.	plug - an old or over-worked horse Synonyms: nag, jade, hack
Verb	1.	plug - fill or close tightly with or as if with a plug; "plug the hole"; "stop up the leak" Synonyms: stop up, secure
	2.	plug - persist in working hard; "Students must plug away at this problem" Synonyms: plug away
	3.	plug - deliver a quick blow to; "he punched me in the stomach" Synonyms: punch
	4.	plug - make a plug for; praise the qualities or in order to sell or promote

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