Scholars from various disciplines have used key concepts to grasp mobilities, but as of yet, a working vocabulary of these has not been fully developed. Given this context and inspired in part by Raymond Williams' Keywords (1976), this edited volume presents contributions that critically analyze mobility-related keywords: capital, cosmopolitanism, freedom, gender, immobility, infrastructure, motility, and regime. Each chapter provides an historical context, a critical analysis of how the keyword has been used in relation to mobility, and a conclusion that proposes future usage or research.