[souprock]

In the US, "college" means narrow subject matter, and "university" means a wide variety of colleges all together on one campus.

For example, there may be a "College of Engineering" and a "College of Arts and Science" that are part of one university.

It's possible to have a stand-alone college that isn't in a university. A good example is Berklee College of Music, which is narrowly focused on music.

[alistairSH]

I’ve never seen “narrow focus” as a definition for college. I’ve always seen it used as US News uses it.

https://www.usnews.com/education/best-colleges/articles/2018...

But, you are correct that subject schools within a larger uni are often called College of Such and Such.