This document discusses different theories of semantics and meaning. It begins by describing early theories that saw meaning as the direct link between words and things. Later theorists argued that meaning involves the relationship between words, concepts, and things, with concepts mediating between words and what they refer to. Meaning was then seen as emerging from the use of words in specific contexts. Later sections discuss theories of sense versus reference, semantic spaces, semantic fields, and analyzing meaning at the level of lexemes rather than words. The document provides an overview of the development of semantic theory from a focus on reference to emphasis on sense and context of use.