| Backboard (n.) A board which supports the back wen one is sitting |
| Backboard (n.) A board serving as the back part of anything, as of a wagon. |
| Backboard (n.) A thin stuff used for the backs of framed pictures, mirrors, etc. |
| Backboard (n.) A board attached to the rim of a water wheel to prevent the water from running off the floats or paddies into the interior of the wheel. |
| Backboard (n.) A board worn across the back to give erectness to the figure. |
| backboard a board used to support the back of someone or something |
| backboard basketball backboard a raised vertical board with basket attached, used to play basketball, "he banked the shot off the backboard" |