noun
rough sketch; preliminary drawing; cartoon (for a painting or tapestry)
A preparatory drawing or sketch used as a guide for a final artwork, such as a painting, print, or textile design. Not a humorous cartoon; the sense is closer to 'underdrawing' or 'preliminary design'.
日本画では、まず下絵を描いてから彩色する。
In Japanese painting, you first draw a rough sketch and then apply colors.
このタペストリーの下絵は有名な画家が手がけた。
The preliminary drawing for this tapestry was done by a famous painter.