By most modern accounts, it's a determiner.
One of them floaty guys that try to kill Harry?
No, a determiner is a person who mines deuterium.
I thought determiners were the guys that hacked games for secrets and stuff?
No, that's a dataminer.
A determiner is a mafia-type, usually found in smoke-filled back rooms with wads of cash and a pistol on the table.
