Deixis refers to linguistic expressions that depend on context for their interpretation. There are several types of deixis: spatial deixis indicates locations relative to the speaker, such as "here" and "there"; temporal deixis involves time expressions like "now" and "then"; person deixis distinguishes the speaker, addressee, and other people or things; discourse deixis refers to parts of the discourse; and social deixis concerns social relationships and statuses. Deixis is a fundamental aspect of pragmatics as it connects language structures to the contexts in which they are used.