The Atlantic Fellows for Social and Economic Equity (AFSEE) Inequalities Glossary aims to demystify key concepts that are often discussed when theorising, researching, and attempting to address issues of social and economic inequalities. The selected entries relate to AFSEE’s own programme of study and the terms that this programme uses in understanding (and challenging) inequalities globally. These terms represent the width and breadth of AFSEE’s curriculum. Each entry consists of a short definition of the term of approximately 300 words. It also includes links to further resources, openly accessible on the internet, and linked to other related entries. Our intended audience includes any researchers, policy advocates or makers, grassroots organisers, civil society activists, teachers, or any other social change practitioner, regardless of area of focus. It aims to be written for non-subject specialists who have a shared interest in challenging social and economic inequalities.