Definitions for "Backboard"
A board which supports the back when one is sitting;
the board athwart the after part of a boat.
A board serving as the back part of anything, as of a wagon.
In CRAPS, the side of the table farthest away from the shooter, where dice are thrown.
A vertical structure used as a guard against losing thrown objects, usually specified in the design of athletic playing fields and surfaces.
The unpolished back of wall furniture.
A wall, usually of wood, that's used for practice. It's often marked with a line at the height of the net.
Keywords:  stuff, mirrors, pictures, thin, framed
A thin stuff used for the backs of framed pictures, mirrors, etc.