Definition of glory holes:
(n) :
(sexuality, slang) A hole in a screen or wall big enough to allow an erect penis to be stuck through, made to facilitate anonymous sex with another person.
(n) :
(glassblowing) A hole in the side of a furnace used to heat glass held on a metal rod.
(n) :
(mining) A hole in a mineshaft where an orebody is mined upwards until it breaks through the surface into the open air.
(n) :
(military, slang) A military trench.
(n) :
(Canada, fishing) An especially good place to fish, a particularly rich fishing spot.
(n) :
(Scotland and Northern England) A deep built-in cupboard under the eaves or stairs of a house used for general storage, particularly of unrelated or unwanted items stored in some disorder.