A relaunch of the of the 1973 JPS occasional section “Concepts and Terms” now renamed Key Concepts in Critical Agrarian Studies. The idea behind the Key Concepts section is to provide a running terminological dictionary in the field of critical agrarian studies. We want to see an element of literature survey to map the evolution of the concept, as well as parallel and even competing interpretations of the meaning of the concept. We also want to see an element of argumentation as to why such a concept and its particular interpretation are relevant to critical agrarian studies. We would like to see concepts that are homegrown in agrarian political economy and critical agrarian studies that might have acquired new meanings or generated competing interpretations over time. In addition, we want to see entries that are not homegrown in agrarian political economy and critical agrarian studies, but that we feel researchers and activists in critical agrarian studies might find relevant to be engaged in the field. Finally, we want to see both old and settled concepts for entries, but we also would like to see propositional concepts.