noun.
The plant woad, Isatis tinctoria; also, the blue dye obtained from it.
noun.
In art: A colored crayon made of pigments ground with chalk, and compounded with gum-water into a sort of paste.
noun.
A drawing made with colored chalks or crayons; also, the art of drawing with colored crayons.
noun.
Figuratively, a short prose study, poetic, picturesque, but sketchy.
noun.
In textiles, a soft half-faded tint in fabrics used for dress-materials: so called from its resemblance to the tones of old pastel drawings.