An electronic intercommunication system, as between two rooms.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "intercom" in a sentence
"I'm hollering to Royal to go but there's so much noise that nobody can hear anything plus Royal's intercom is no longer connected."
"Oh yeah, for an extra kick to dad’s balls, an intercom is left on at his bedside, enabling him to listen in on the arguing with tears rolling down his face."
"The intercom was a metal box that signified the end of my parent's marriage."