Match each term about cities to the correct definition. Drag each item on the left to its matching item on the right. edge city metropolis urban density megalopolis concentration of people in a city, measured by the total number of people per square mile a group of densely populated metropolises that grow dependent on each other and eventually combine to form a huge urban complex an urban area with a large population, usually 500,000 to 1 million people a center of employme