The phrase "big city" refers to a highly populated urban area with a lot of buildings, people, and opportunities for jobs, entertainment, and services. Full definition
Similar and related words and phrases are presented below.
Life in small towns differs from life in big cities in a lot of ways, including how people look for jobs. (smallbusinessesdoitbetter.com)
In big cities like Aurora, dating sites could be really useful and effective. (doulike.com)
I think it's a very common story for American artists raised outside of big cities with their significant museums and deep European traditions. (theholenyc.com)