Definition of "plug" []

• An object, such as a cork or a wad of cloth, used to fill a hole tightly; a stopper. (noun)
• A dense mass of material that obstructs a passage. (noun)
• A usually cylindrical or conic piece cut from something larger, often as a sample. (noun)
• Electricity A fitting, commonly with two metal prongs for insertion in a fixed socket, used to connect an appliance to a power supply. (noun)
• Electricity A spark plug. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Now I no longer chuckle when I see the term plug and play, because with Linux, that phrase really does describe how easy it is."
• "Normally, a plug is always in place here, because this is an areawhere sewer gases dwell."
• "It arrives with an American flat-pin plug, which is useless here."