Any set of closed lines, curves, etc., used to define a particular region or shape.
In typography, a typeface with no insides. Outline faces are used in display work, and lend themselves to colored or tinted layouts, allowing the type to drop out of the background. The insides of letters (normally white) can be used for special effect in color or dropout of color. Since these are "busy" typefaces, they should be used sparingly and only in display sizes. Also known as outline characters.