Postal
Part of speech: adjective
Definition: Relating to the collection , sorting and delivery of mail.
Communication
Part of speech: noun
Definition: The concept or state of exchanging information between entities.The potential for information exchange.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.A connection between two tissues, organs, or cavities.
Example sentence: The most important thing in communication is hearing what isn't said.