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/articl

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/2018-02-14/understand-the-difference-between-a-college-and-university-in-the-us 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.