1. phone, telephone, telephone set

electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds

Example Sentences:
'I talked to him on the telephone'

• telephone
• telephone set

2. phone, sound, speech sound

(phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language

• sound
• speech sound

3. earphone, earpiece, headphone, phone

electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear

Example Sentences:
'it was not the typing but the earphones that she disliked'

• earphone
• earpiece
• headphone

4. call, call up, phone, ring, telephone

get or try to get into communication (with someone) by telephone

Example Sentences:
'I tried to call you all night'
'Take two aspirin and call me in the morning'

• call
• call up
• ring
• telephone