One fundamental definition that has influenced much of our nowadays world organization is that of “city”. Certain definitions of “city”, tightly linked to land use and property, exist on the basis of the modern organization of societies, economies and the politics of the world. With that also emerged a “cultural divide” between cities and countryside, including a development divide that often supports the maintenance of asymetrical development paths and socio-ecological interactions. Formal, informal, ruled, desired, imagined conceptions of “city” contribute to this process. As the global human population steadily becomes more urbanized; as cities become central to regulate socio-ecological interactions; as the limits, functions and definitions of cities become more blurred it is timely to renovate the understanding of what is “city”.