This document discusses semantics, the study of meaning in language. It covers four main topics: (1) the nature of meaning, (2) properties of the conceptual system underlying meaning, (3) the contribution of syntactic structure to sentence interpretation, and (4) the role of non-grammatical factors in understanding utterances. It also discusses polysemy, where a word can have multiple related meanings, and provides examples like "table" and "count". The goal is to generally consider what research has revealed about meaning in human language.