 Our focus in this entry will be on semantic theories of word meaning, i.e., on theories that try to provide an answer to such questions as “what is the nature of word meaning?”, “what do we know when we know the meaning of a word?”, and “what (kind of) information must a speaker associate to the words of a language in order to be a competent user of its lexicon?”. However, we will engage in foundational considerations whenever necessary to clarify how a given framework addresses issues in the domain of a semantic theory of word meaning.