Depends on your definition of "city". Is Geraldton or Bunbury a city? Not by European standards, though maybe by the US definition.
To a Brit, those are towns, probably even small towns.
To a Brit, those are towns, probably even small towns.
The term "big city" is more specific. That's a major city, probably with skyscrapers. Population is probably close to a million or more.
The term "metropolis" is even more specific. That's a really big city, one of the top 20 in the US, to give a rough sense. Chicago, New York, Los Angeles are metropolises. Denver? It's a big city, but I don't know about metropolis.
The next town along from where I grew up in the UK is about 80k and is in no way a city...