Although occupation is the central concept in occupational therapy, there is no universally agreed definition. In fact, there are several different ways that occupation is conceptualized in the occupational therapy and occupational science literature. This leads to confusion and impacts on communication because each way of representing occupation is slightly different, although there are some similarities. This chapter provides an overview of four ways in which occupation is presented in the literature: definitions, taxonomies, occupation and other terms, and models. The intention is to provide readers with a structure that can be used when they are engaging with the literature and to encourage greater precision in communicating about occupation. The chapter acknowledges that most of the literature on occupation has been presented from a colonized perspective, and therefore all occupational therapists and students must be critical of how that has shaped the concept of occupation.