[David Johnston2]

Magic is an extremely vague term that is less about defining a thing than defining someone’s attitude toward the thing. Call something “magic” and you are saying one of these things:

There is something about this I could never understand
There is something about this I don’t want to want to understand because that would make it less special.
While I understand this thing just fine, I don’t want other people to understand it.
There is something that we once thought we’d never understand and called magic then, and are still calling “magic” out of force of habit.