The document discusses various planning and development related terms. It defines village, town, city, region, metropolis and megalopolis. It also explains concepts like five year plan, regional development plan, perspective plan, comprehensive development plan, city development plan, and their objectives. The document then defines terms related to demography, economics, ecology, sociology, geography, cartography, anthropology, statistics and archeology. It also discusses urban forms like linear, radial, grid and star patterns. Finally, it elaborates on concepts like neighbourhood units, density calculations, transportation systems and environmental engineering terms.