When someone tells you about a film they have just seen, you would probably assume that the film in question is a film with sound that is based on recorded colour images of actors acting out a narrative, complete with synchronized dialogue, sound effects and music. The noun ‘film’ is ambiguous, however. The Merriam-Webster online dictionary provides eight different uses of the word – ranging from things such as food wrapping to the more relevant material of celluloid used for photographic imprints and film as a specific type of artistic object (Merriam-Webster 2020).