| Noun | 1. | plug - blockage consisting of an object designed to fill a hole tightlybung, spile - a plug used to close a hole in a barrel or flask cork - the plug in the mouth of a bottle (especially a wine bottle) drainplug - a removable plug for holding water in a tub or basin fipple - a wooden plug forming a flue pipe (as the mouthpiece of a recorder) tampion - plug for the muzzle of a gun to keep out dust and moisture tampon - plug of cotton or other absorbent material; inserted into wound or body cavity to absorb exuded fluids (especially blood) spigot, tap - a plug for a bunghole in a cask | |
| 2. | plug - a wad of something chewable as tobaccobite, morsel, bit - a small amount of solid food; a mouthful; "all they had left was a bit of bread" | |
| 3. | plug - blatant or sensational promotion | |
| 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 | |
| 5. | plug - an electrical device with two or three pins that is inserted in a socket to make an electrical connection | |
| 6. | plug - an upright hydrant for drawing water to use in fighting a firehydrant - a discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks | |
| 7. | plug - an old or over-worked horseEquus caballus, horse - solid-hoofed herbivorous quadruped domesticated since prehistoric times | |
| Verb | 1. | plug - fill or close tightly with or as if with a plug; "plug the hole"; "stop up the leak"stopper, stopple - close or secure with or as if with a stopper; "She stoppered the wine bottle"; "The mothers stoppered their babies' mouths with pacifiers" fill up, close - fill or stop up; "Can you close the cracks with caulking?" chink - fill the chinks of, as with caulking | |
| 2. | plug - persist in working hard; "Students must plug away at this problem" | |
| 3. | plug - deliver a quick blow to; "he punched me in the stomach"hit - deal a blow to, either with the hand or with an instrument; "He hit her hard in the face" | |
| 4. | plug - make a plug for; praise the qualities or in order to sell or promoteadvertize, advertise, promote, push - make publicity for; try to sell (a product); "The salesman is aggressively pushing the new computer model"; "The company is heavily advertizing their new laptops" | |