communication
US /kəˌmjuː.nəˈkeɪ.ʃən/
UK /kəˌmjuː.nəˈkeɪ.ʃən/

1.
the imparting or exchanging of information by speaking, writing, or using some other medium
:
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Effective communication is key to a successful team.
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They established clear lines of communication.
2.
3.
social dealings; a connection or relationship between people or groups
:
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There was a lack of communication between the two departments.
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Good communication fosters strong relationships.