What is "minored"

Usage examples of "minored".

And a small, cowardly part of himself that he despised counseled, it was probably best not to make too much of an enemy of Privates: the Creative Writing program here at SUNY Huguenot was small, and the chances were better than even he was going to encounter the professor again, especially if he majored, or even minored, in Creative Writing.

I remember she minored in some sort of complex math, and there was science, too.