Films tell stories, communicate ideas, and excite our imagination. Films are created by cultures and reflect those cultures, and in turn, affect those cultures. Films are an art form, a source of popular entertainment and a powerful method for educating people.
Films have elements in common with plays and dances, – scripts, sets, costumes, production, direction, actors, audiences, storyboards, and scores.
The visual elements of film give them a universal power of communication. Films have become popular worldwide by dubbing the soundtrack or using subtitles to translate the dialogue into the language of the viewer.
Wikipedia on film