What does "intercom" mean?

An independent, telephonic communication system, set up around and throughout a building, complex, or residence, typically for access control.

Intercom

Common synonyms include: announce via intercom, audio sound system, audiophile, binaural system, bitch box, bullhorn.

noun, verb

noun, verb ·3 syllables ·Moderate ·College level

Noun

1
An independent, telephonic communication system, set up around and throughout a building, complex, or residence, typically for access control.
"emergency intercom"
2
a communication system linking different rooms within a building or ship etc wordnet

Verb

"Tom leaned out the window of his car and pressed the button on the intercom at the gate."

Clipping of intercommunicator.