(1) To allow a wash of watercolor or other thin medium to run into and combine with another area of color. (2) To make artwork, that is to be reproduced by printing, larger than the final page size so that, when the page is trimmed, there is no margin. Source: Ralph Mayer, "A Dictionary of Art Terms and Techniques"<br><br>Printing that extends to the edge of a sheet or page after trimming.<br><br>Pigments that run into an adjoining area or up through coats of paint, usually undesirably (see bleeding through and bleed-proof). A fuzziness or spreading at the edges of a painted area. And, in the graphic arts, to extend the edge of a printed area, leaving no margin at one or more edges of a page. This is done by printing an extra 1/8 inch of image area, to be trimmed later.Also see bleed marks, permanent pigment, polymer clay, stain, and stain removal.