Pragmatics

[Zipporah Schumaker]

the study of how language is affected by the situation in which it is used, of how language is used to get things or perform actions, and of how words can express things that are different from what they appear to mean

[Kai]

The branch of linguistics dealing with language in use and the contexts in which it is used, including such matters as deixis, the taking of turns in conversation, text organization, presupposition, and implicature.