The unconscious or conscious gestures and movements through which a person's attitudes, feelings, or state of mind are revealed. Also in extended use.

Communication which underlies or takes place alongside a given act of communication, and serves to supplement or enhance it; an instance of this…

Originally: any higher-order discussion about language. Now usually: hidden meanings or significance in a conversation, etc. Cf. metacommunication, n.

Originally: the context of a message, or a statement about that context. Now usually: an underlying meaning, a subtext; a hidden message.