Urbanize means to transform a place into a city or make it more city-like. When an area urbanizes, farms and open land give way to houses, apartments, stores, and roads. Small towns grow into cities, with more people living closer together and new infrastructure like subway systems, traffic lights, and tall buildings appearing where fields or forests once stood.

Throughout history, societies have urbanized as people moved from rural areas to cities seeking jobs, education, and opportunities. During the Industrial Revolution, cities like Manchester and Pittsburgh urbanized rapidly as factories drew workers from the countryside. Today, cities around the world continue urbanizing as populations grow.

When historians say a region is urbanizing, they mean it's shifting from a rural, agricultural way of life to an urban, city-based one.

Urbanization brings both benefits and challenges. Cities offer more jobs, better schools, and cultural attractions like museums and theaters. But urbanizing areas must also solve problems like traffic congestion, housing shortages, and environmental concerns. An urbanized area has completed this transformation: what was once countryside has become part of the city's sprawl, with sidewalks, streetlights, and neighbors living side by side instead of miles apart.