Definition of intercom noun from the Oxford Advanced American Dictionary

 

intercom

 noun
noun
NAmE//ˈɪntərˌkɑm//
 
 
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a system of communication by telephone or radio inside an office, plane, etc.; the device you press or turn on to start using this system to announce something over the intercom They called him on the intercom.
See the Oxford Advanced Learner's Dictionary entry: intercom