Background n. : Ground in the rear or behind, or in the distance, as opposed to the foreground, or the ground in front.

Background n. : The space which is behind and subordinate to a portrait or group of figures.

Background n. : Anything behind, serving as a foil; as, the statue had a background of red hangings.

Background n. : A place in obscurity or retirement, or out of sight.

Example:


Taxonomy
Free Backgrounds, myspace background, Free-Backgrounds, screen saver, space background, background image, desktop background, background code, cool background, animated background, IE Users, Netscape Users, background graphics, definitive resource, Sponsored Links, creator, Halloween, nighttime.

Defination from the web:
background images suitable for web pages or desktop wallpapers. Categories include artistic, business, borders, classic, general, holidays, natural, patterns, and tiled/textured.