a communication system within a building, ship, airplane, local area, etc., with a loudspeaker or receiver for listening and a microphone for speaking at each of two or more points.
[ 1910-15 ]
INTERCOMMUNICATION SYSTEM
Meaning of INTERCOMMUNICATION SYSTEM in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012