A sort is a type or a kind of something, or the act of categorizing things. If you’re an organized sort of person, sort your clothes by color. If you’re the disorganized sort, just chuck them all over the floor.
The noun sort can mean a category or example, or even a type of person, as in "My sister is a generous sort." As a verb, it means "organize, categorize, or resolve" like when you sort your earrings by size or your math teacher helps you sort out what went wrong on the latest test. Sort comes from the Latin sortem, "share or portion" and also "fate or destiny."