from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To soften the colors or outlines of (a painting or drawing) by covering with a film of opaque or semiopaque color or by rubbing.
- transitive v. To blur the outlines of: a writer who scumbled the line that divides history and fiction.
- n. The effect produced by or as if by scumbling.
- n. Material used for scumbling.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An opaque kind of glaze (layer of paint).
- v. to apply an opaque glaze to an area of a painting to make it softer or duller
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To cover lighty, as a painting, or a drawing, with a thin wash of opaque color, or with color-crayon dust rubbed on with the stump, or to make any similar additions to the work, so as to produce a softened effect.
from The Century Dictionary and Cyclopedia
- In oil-painting, to blend the tints or soften the effect of, by lightly passing a brush charged with a small quantity of an opaque or semiopaque coloring over the surface; in chalk - or pencil-drawing, to rub lightly the blunt point of the chalk over the surface of, or to spread and soften the harder lines of with the stump: as, to scumble a painting or a drawing.
- n. A softened effect produced by scumbling. See scumbling.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the application of very thin coat of color over the surface of a picture
Possibly from scum.(American Heritage® Dictionary of the English Language, Fourth Edition)
Uncertain origin, perhaps from scum. (Wiktionary)