Would it be called cannibalism if a Zombie eats a human?

Yes, it would be considered cannibalism if a zombie eats a human, as the term refers to one individual of a species consuming another individual of the same species. In this case, both Zombies and humans are classified as members of the species Homo sapiens, despite the zombies being in a reanimated state. Therefore, the act of a zombie consuming a human fits the definition of cannibalism.