noun (common) (futsuumeishi) zona roja;distrito rojo;barrio rojo

noun (common) (futsuumeishi) red line

noun (common) (futsuumeishi) historical term abbreviation red-light district (marked by a red line on police maps)

noun (common) (futsuumeishi) non-legal public road (denoted by a red line on cadastral maps; sometimes no longer physically existing)