headphones UK /ˈhɛdfəʊnz/US /ˈhɛdfoʊnz/ noun[usually plural]2 •A pair of cushioned speakers worn over or in the ears so only the wearer can hear the sound.Circumaural headphones enclose the ear, supra-aural headphones rest on the ear's surface, and earbuds are placed inside the ear. •A pair of cushioned speakers worn over or on the ears. formsheadphone