The act or fact of communicating anything; transmission.

(uncountable) The concept or state of exchanging data or information between entities.

A message; the essential data transferred in an act of communication.

The body of all data transferred to one or both parties during an act of communication.

An instance of information transfer; a conversation or discourse.

A passageway or opening between two locations; connection.

(anatomy) A connection between two tissues, organs, or cavities.

Participation in Holy Communion.

(rhetoric) A trope by which a speaker assumes that his hearer is a partner in his sentiments, and says "we" instead of "I" or "you".