- A board which supports the back wen one is sitting; - A board serving as the back part of anything, as of a
wagon. - A thin stuff used for the backs of framed pictures,
mirrors, etc. - 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. - A board worn across the back to give erectness to the
figure.
Meaning of 'backboard' (Princeton's WordNet)
1 . backboard
[ n]
Meaning (1): - a raised vertical board with basket attached; used to play basketball