Exactly. When I was little I thought all the things I was doing was just coincidence or a trick of my mind - I never really considered that it was magic.

[ It is very small, but it got much, much larger as she got older, and not always in the best of ways. ]

Muggle means people without magic. So anyone who had parents that weren't magic, or a single parent that wasn't from a magical family. He preferred... Purebloods.