Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An object made of a soft, pliable material and fitted into the ear canal to block the entry of water or sound.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A piece of protective clothing 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 transitive To fit with earplugs.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an earphone that is inserted into the ear canal
  • noun a plug of cotton, wax, or rubber that is fitted into the ear canal for protection against the entry of water or loud noise

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

ear +‎ plug

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