As per Wikipedia and others, the meaning of Noir takes on several languages and definitions.
Pronounced NoAre – Noir is the French word for Black.
“Crime fiction featuring hard-boiled cynical characters and bleak sleazy settings an example of classic noir.”
“Film genre characteristic of the years between with 20’s and late 40’s. Dark, gritty crime fiction: usually a heist, murder, or other such crime. We’re talking Tommy Guns, Private Detectives, and women you could still call broads. Classic examples include The Maltese Falcon and Chinatown: modern examples include The Usual Suspects. Heavily influenced the Cyberpunk sub-genre.”