from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A device that converts electric signals, as from a telephone, stereo, or radio receiver, to audible sound and fits over or in the ear. Also called earpiece.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A transducer that converts electric signals into sound and is held near the ear, especially as part of a telephone; an earpiece or headphone.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear
ear + phone. (Wiktionary)