1. an electronic communication system that allows people in different parts of a building or area to speak to each other

Examples

• The teacher used the intercom to make an announcement to all classrooms.
• Please use the intercom at the front gate to identify yourself.
• The pilot spoke to passengers over the aircraft’s intercom system.
• The office intercom crackled as the receptionist called for Dr. Smith.
• Security guards communicate through a two-way intercom.
• The apartment building has an intercom system at the entrance.
• She pressed the intercom button to speak with her assistant.