green light district
green light district
n
an area in which prostitution is officially tolerated
[C21: from green light, modelled on red-light district]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014