"communications" in the noun sense
1. communication, communicating
the activity of communicating the activity of conveying information
"communications is his major field of study"
"they could not act without official communication from Moscow"
2. communication
something that is communicated by or to or between people or groups
3. communication
a connection allowing access between persons or places
"how many lines of communication can there be among four people?"
"a secret passageway provided communication between the two rooms"
Source: WordNet® (An amazing lexical database of English)
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