Background

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

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

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

A place in obscurity or retirement, or out of sight.

extraneous signals that can be confused with the phenomenon to be observed or measured; "they got a bad connection and could hardly hear one another over the background signals"

understate the importance or quality of; "he played down his royal ancestry"

information that is essential to understanding a situation or problem; "the embassy filled him in on the background of the incident"

(computer science) the area of the screen in graphical user interfaces against which icons and windows appear

the state of the environment in which a situation exists; "you can't do that in a university setting"