No worries B.E.-The explanation I printed above of cannibal is from the Oxford English dictionary.Enough said.
Cannibalism in a film in my book makes it a cannibal film,no matter what wikipedia says...
Silence of the Lambs-Hannibal the Cannibal-He's a main plot device/character in the film,he eats human flesh,so IMHO,also a cannibal film.