1. (noun)telephone, phone, telephone set electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds Synonyms: sound, telephone, earphone, telephone set, phone, earpiece, headphone, telephony, speechsound
3. (verb)earphone, earpiece, headphone, phone electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear Synonyms: sound, telephone, earphone, telephone set, phone, earpiece, headphone, speech sound