Webster’s Revised Unabridged Dictionary · 1913
Background
Back′ground′ (·ground′), n. [Back, a. + ground.]
1. Ground in the rear or behind, or in the distance, as opposed to the foreground, or the ground in front.
2. (Paint.) The space which is behind and subordinate to a portrait or group of figures.
☞ The distance in a picture is usually divided into foreground, middle distance, and background. Fairholt.
3. Anything behind, serving as a foil; as, the statue had a background of red hangings.
4. A place in obscurity or retirement, or out of sight.
I fancy there was a background of grinding and waiting before Miss Torry could produce this highly finished . . . performance. Mrs. Alexander.
A husband somewhere in the background. Thackeray.
To place in the background, to make of little consequence.