I never really had to describe it, so I hope this makes some sense. It's like if you take a city and some farmland and you averaged them out. So you have a network of streets with houses that have some land of their own, but everyone is still pretty close together. Not too close, though.
It's usually where you have a city and the suburbs cluster around it. You know, for people who don't want to live in such a busy place, but they don't want to be so far away from the city, either.