Yesterday, I posted a definition of interpersonal communication from one of my own books. I thought I'd search to see how other textbook writers define it. Here are just a few:
...interpersonal communication occurs when people treat one another as unique individuals, regardless of the context in which the interaction occurs or the number of people involved.
Adler, Rosenfeld, Proctor Interplay, p. 15
…interpersonal communication refers to the exchange of messages, verbal and nonverbal, between people regardless of the relationship they share.
--Guerrero, Andersen, Afifi Close Encounters, p. 11
…the transactional creation of meaning, either intentionally or unintentionally, within a dyadic social relationship.
--Jones, Remland, Sanford Interpersonal Communication through the Life Span, p. 10
Interpersonal communication involves at least two people who establish a communicative association.
Lane, Interpersonal Communication, p. 4
Interpersonal communication is a dynamic form of communication between two (or more) people in which the messages exchanged significantly influence their thoughts, emotions, behaviors, and relationships.
McCornack, Reflect and Relate, p. 20
…the process through which people create and manage their relationships, exercising mutual responsibility in creating meaning.
Verderber, Verderber Inter-Act, p. 3