(a) a shadowy region; (b) a world characterized by uncertainty, obscurity, or decline; (c) the world which comes to life after sunset…

(a) spec. an urban area in which housing is becoming decrepit; (b) gen. an indistinct boundary area combining some of the characteristics of the two…

A place in shadow; a gloomy, unhappy place; an indeterminate borderland between other places, states, etc.

With the. An aspect or aspects of life characterized as being shadowy, sinister, evil, criminal, etc., and viewed as constituting a distinct side or…