Any piece of fabric hung to mask the top of an opening. Often used to refer only to the ornate one hung just upstage of the proscenium (the rest are borders or the amateurish "teasers"), especially when matching the House Curtain or Main Rag: House Valance.
See also: http://www.controlbooth.com/forums/...weight-fly-system-rigging-sub-glossaries.html.
See also: http://www.controlbooth.com/forums/...weight-fly-system-rigging-sub-glossaries.html.