One cannot fully understand a theory—any theory—without knowing how its meaning is determined, without figuring out the purported relationship between the language of the theory and its semantic attributes. Explaining this relationship is the main task of metasemantics. This chapter introduces this task, in general terms, and then presents representationalism and non-representationalism as rival metasemantic views about quantum mechanics (QM). The analysis of the overall hypothesis of the book, that metasemantics contributes to an adequate philosophical understanding of QM, will focus on two problems for these views: categoricity and permanence.