It is sometimes said that there is a long-standing debate between zombie enthusiasts about whether or not Frankenstein is a zombie. Not really. There’s no debate that we’re aware of, at least not between two sane people who can form a logical train of thought.
Mary Shelley’s monster is not a zombie.
Though Dr. Frankenstein uses scientific means to create his creature in Shelley’s novel, he’s not a reanimated corpse. In fact, he’s not a corpse at all, but a collection of body parts stolen from different corpses and brought together to form a single new entity. Frankenstein is also not a reanimated corpse in the sense of being undead. He has a heartbeat and is fully alive in the classical sense of being a living creature.
He is brought to life rather than reanimated. Frankenstein is furthermore not relentlessly aggressive. He’s quite a sensitive and thoughtful guy. He even tries to learn how to read and desires, above all, to be loved. He’s driven to anger and destructiveness through his mistreatment by humans, who discriminate against him largely because of his appearance.
Finally, the process by which he was made to exist does not involve an infection. He doesn’t eat and/or bite people to spread his condition. In fact, he doesn’t have a “condition” at all, except for the tragedy of his loneliness. When you’re attacked or killed by Frankenstein you don’t turn into Frankenstein!
Later Hollywood versions of Frankenstein make him less sympathetic and more predatory, but his essential problem remains: he just doesn’t fit in with others.
Not a zombie. Not even close.