ˈ ̷ ̷ˌ ̷ ̷ noun
: a board or other construction placed at or fastened to the back of some object (as a picture) or serving as the back (as of a wagon) ; specifically : a rounded or rectangular board that is behind the basket on a basketball court and that serves to keep missed shots from going out of bounds and as a surface from which the ball can be made to rebound into the basket