noun [C] a large flat board used for holding a piece of paper while a drawing or plan is being made 绘画板；画图板: an architect's drawing board 建筑师的制图板 (go) back to the drawing board to start thinking about a new way of doing sth after an earlier plan or idea has failed ﹙失败后﹚重起炉灶，从头开始: They rejected our proposal, so it's back to the drawing board.他们拒绝了我们的建议，所以我们只好从头开始了。