earplug -
a plug of cotton, wax, or rubber that is fitted into the ear canal for protection against the entry of water or loud noise
earplug -
an earphone that is inserted into the ear canal
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= antonym
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Wiktionary
Substantiv
earplug -
A piece of protectiveclothing that is meant to be inserted in the ear canal to protect the wearer's hearing from loud noises or the intrusion of water.
Verb
earplug -
To fit with earplugs.
Wikipedia
An earplug is a device that is meant to be inserted in the ear canal to protect the wearer's ears from loud noises or the intrusion of water, foreign bodies, dust or excessive wind.
OmegaWiki Dictionary
Ω
earplug A plug of soft, pliable material inserted into the opening of the outer ear, esp. to keep out water or noise.