Behavior or activity that signals the context in which an utterance should be interpreted or understood. Features of a message's form that indicate how the message should be understood, including its relationship to activities that precede or follow it
Gumperz, John. Discourse Strategies. Cambridge: Cambridge University Press. 1982.
A cognitive scheme or model of what social elements of an interaction are relevant, created by joint efforts of the participants in the interaction
Auer, Peter. From context to contextualization. Links & Letters 3: 11-28. 1996.