An object made of a soft, pliable material, such as cotton or rubber, and fitted into the ear canal to block the entry of water or sound.(noun)
An earphone, especially one that fits into the ear.(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.
Use "earplug" in a sentence
"How about an earplug hack: filters from (unused) cigarettes? colorebel"
"The torture eventually became so great that I started bringing a transistor radio, and an earplug, to listen to Yankee games."
""They're on 37th and Park," I heard one operative wearing an earplug whisper to another."