What I think a zombie is:
Usually pale if white man or woman.
They are Blood-soaked.
Usually they have been already hurt with concussions, bite-marks, and bullet holes.
They usually do not have any sense of speaking at all.
They make sounds out of their mouths like moaning and groaning.
Depending on the type of zombie, their speed differs.
They have the ability to use weapons like guns.
Zombies can differ altogether.
They can be like zombies from halo or starcraft that have been infected by alien monsters.
Or they can just be regular old fashioned zombies that like to eat people.
That's my opinion. What about yours?