intercom
noun
in·ter·com ˈin-tər-ˌkäm 
: a two-way communication system with a microphone and loudspeaker at each station for localized use
Example Sentences
I heard my name called on the intercom. His secretary's voice came over the intercom, telling him that he had a visitor.
Recent Examples on the Web The school intercom system clicked on, and everyone could hear gunshots, screaming and crying. 
Hartford Courant, 7 Sep. 2022 The victim then contacted a train operator over an intercom while Hollie moved to a different car. Ronn Blitzer, Fox News, 11 Aug. 2022 Additionally, Fernandez said the district will approach fire drills differently, using the intercom system instead of sirens, the paper reported. Rosa Flores, CNN, 7 Aug. 2022 After pulling them over, officers used their intercom system to order Armstead, who was driving, to throw the keys out the window, exit the car and get on her knees with her hands up, according to the suit. Michael Murney, Chron, 4 Aug. 2022 Administrators could have used the campus intercom system, but that didn't happen, according to the document. Antonio Planas, NBC News, 26 July 2022 Some even allow security personnel to speak directly to the intruder via an app, serving as a real-time intercom. Fredrik Nilsson, Forbes, 6 July 2022 The school doesn’t have lockers and Mr. Hugh plays the xylophone over the intercom in lieu of a bell. al, 28 May 2022 Then the gate agent called his name over the intercom. Ben Taub, The New Yorker, 16 May 2022 See More
Hartford Courant, 7 Sep. 2022 The victim then contacted a train operator over an intercom while Hollie moved to a different car. Ronn Blitzer, Fox News, 11 Aug. 2022 Additionally, Fernandez said the district will approach fire drills differently, using the intercom system instead of sirens, the paper reported. Rosa Flores, CNN, 7 Aug. 2022 After pulling them over, officers used their intercom system to order Armstead, who was driving, to throw the keys out the window, exit the car and get on her knees with her hands up, according to the suit. Michael Murney, Chron, 4 Aug. 2022 Administrators could have used the campus intercom system, but that didn't happen, according to the document. Antonio Planas, NBC News, 26 July 2022 Some even allow security personnel to speak directly to the intruder via an app, serving as a real-time intercom. Fredrik Nilsson, Forbes, 6 July 2022 The school doesn’t have lockers and Mr. Hugh plays the xylophone over the intercom in lieu of a bell. al, 28 May 2022 Then the gate agent called his name over the intercom. Ben Taub, The New Yorker, 16 May 2022 See More Word History
Etymology
short for intercommunication system
First Known Use
1940, in the meaning defined above
Kids Definition
intercom
noun
in·ter·com ˈin-tər-ˌkäm
: a communication system with a microphone and loudspeaker at each end