In linguistics, deixis is the use of words or phrases to refer to a particular time (e.g. then), place (e.g. here), or person (e.g. you) relative to the context of the utterance. Deixis exists in all known natural languages and is closely related to anaphora, with a sometimes unclear distinction between the two. In linguistic anthropology, deixis is seen as the same as, or a subclass of, indexicality.
The term's origin is Ancient Greek: δεῖξις, romanized: deixis, lit. 'display, demonstration, or reference'. To this, Chrysippus (c. 279 – c. 206 BCE) added the specialized meaning point of reference, which is the sense in which the term is used in contemporary linguistics.