WordReference Random House Learner's Dictionary of American English © 2014
ear•phone /ˈɪrˌfoʊn/USA pronunciation  n. [countable]
  1. a sound receiver, as of a radio or telephone, that fits in or over the ear.
  2. Usually, earphones. [plural] a headset.

Collins Concise English Dictionary © HarperCollins Publishers::

earphone /ˈɪəˌfəʊn/ n
  1. a device for converting electric currents into sound waves, held close to or inserted into the ear

'earphone' also found in these entries:
In the English description:

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