Film is a term with multiple meanings:
1. A motion picture or movie ("Let's go see a film tonight")
2. The thin flexible material used in photography ("I need to buy a roll of film")
3. A thin layer or coating ("There's a film of dust on the table")
4. To record something on film ("We're filming a documentary")
Fun fact: The word "film" comes from Old English "filmen" meaning membrane or thin skin.