A receiver, as for a telephone, radio, or stereo, held to the ear by a headband.(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 "headphone" in a sentence
"Razer has moved to an open-back, ear-encompassing headphone, which is good for those of us who don't like stuff actually sitting on our ears, and I personally think it helps with sound placement as well."
"The Skype service is a bit different because you need special hardware to access it, namely a headphone + microphone combination."
"They were here to promote some kind of headphone set, I think."