Fondo

noun background; plural noun: backgrounds

I. The area or scenery behind the main object of contemplation, especially when perceived as a framework for it.
"the house stands against a background of sheltering trees"
synonyms: backdrop, backcloth, surrounding(s), setting, scene "a background of palm trees"

II. The part of a picture or design that serves as a setting to the main figures or objects, or that appears furthest from the viewer.
"the background shows a landscape of domes and minarets"

COMPUTING
used to describe tasks or processes running on a computer that do not need input from the user.
"programs can be left running in the background"