Film noir (/nwɑːr/; French: [film nwaʁ]) is a style of Hollywood crime drama that emphasizes cynical attitudes and motivations. The 1940s and 1950s are generally regarded as the "classic period" of American film noir. Film noir of this era is associated with a low-key, black-and-white visual style that has roots in German expressionist cinematography. Many of the prototypical stories and attitudes expressed in classic noir derive from the hardboiled school of crime fiction that emerged in the United States during the Great Depression, known as noir fiction.
The term film noir, French for "black film" (literal) or "dark film" (closer meaning), was first applied to Hollywood films by French critic Nino Frank in 1946, but was unrecognized by most American film industry professionals of that era. Frank is believed to have been inspired by the French literary publishing imprint Série noire, founded in 1945.