an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device.

to speak to or summon (a person) by telephone.

to send (a message) by telephone.

to send a message by telephone.

verb

buzz * , call , call up , contact , dial , get back to , get on the horn , get on the line , give a call , give a jingle , give a ring , make a call , phone , pick up * , put a call through , ring , ring up , touch base with , buzz , glass , mouthpiece , telescope