Noir is a suspenseful film genre that originated in the 1940s. It is characterized by dark and brooding themes, as well as morally ambiguous characters. NOIR films often feature crime, violence, and moral ambiguity, and are often set in urban environments. NOIR films are known for their use of shadows and chiaroscuro lighting to create a sense of tension and suspense. NOIR films have become a staple of the film industry, and have been adapted into many other genres.