From Longman Dictionary of Contemporary Englishintercomin‧ter‧com /ˈɪntəkɒm $ ˈɪntərkɑːm/ noun [countable] TCTTAa communication system by which people in different parts of a building, aircraft etc can speak to each other The pilot’s voice came over the intercom.
Examples from the Corpus
intercom• No intercom, nor any information about what those needing assistance should do.• On the suddenly silent intercom, no explanation offered, still less an apology.• However, the fail out alarm had been knocked out and the intercom was working badly.• I clicked in the intercom and asked the crew chief and the gunner if they were ready.• The Minister's secretary buzzed him on the intercom.• We all cracked jokes over the intercom and talked about what we were going to do.• Most of them shouted over the intercom at every repeated mistake.• The static over the intercom was terrible.over the intercom• We all cracked jokes over the intercom and talked about what we were going to do.• Most of them shouted over the intercom at every repeated mistake.• The static over the intercom was terrible.• "Welcome to St. Petersburg, " said a voice over the intercom.Origin intercom (1900-2000) intercommunication (system) 