How do you spell Background

Available Definitions:
1)  n. - Ground in the rear or behind, or in the distance, as opposed to the foreground, or the ground in front.
2)  n. - The space which is behind and subordinate to a portrait or group of figures.
3)  n. - Anything behind, serving as a foil; as, the statue had a background of red hangings.
4)  n. - A place in obscurity or retirement, or out of sight.