'Scumble' definitions:
Definition of 'scumble'
From: WordNet
noun
The application of very thin coat of color over the surface of a picture
Definition of 'Scumble'
From: GCIDE
- Scumble \Scum"ble\, v. t. [imp. & p. p. Scumbled; p. pr. & vb. n. Scumbling.] [Freq. of scum. [root] 158.] (Fine Arts) 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. [1913 Webster]