A cinema is another word for a movie theater. If you love films, you probably spend a lot of time at the cinema.
It's more common to say cinema in Britain than in the United States, but any English speaker will know what you're talking about if you ask, "Want to go to the cinema?" You can also use cinema to talk about the film industry and its history: "This is my favorite film in all of American cinema." The word was first used in 1899, from the French cinéma, which was a shortened form of cinématographe, "motion picture projector and camera."