'Intercommunication' definitions:

Definition of 'intercommunication'

From: WordNet
noun
Mutual communication; communication with each other; "they intercepted intercommunication between enemy ships"

Definition of 'Intercommunication'

From: GCIDE
  • Intercommunication \In`ter*com*mu`ni*ca"tion\, n. Mutual communication. --Owen. [1913 Webster]