Other forms: headphones
A headphone is one of a pair of small speakers worn over the ears. A headphone socket.
The singular is used mostly in compounds, since nobody wears one on its own. A good pair of headphones will show up faults in a recording that speakers hide.
1nounheadphoneOne of a pair of small speakers worn over the ears.
“One headphone had gone dead halfway through.”
headphone is a speaker.
Also accepted in games: earphone
From head + phone.
Etymology from Wiktionary, CC BY-SA