background (Noun) — A person's social heritage: previous experience or training. ex. "he is a lawyer with a sports background"
background (Noun) — The part of a scene (or picture) that lies behind objects in the foreground. ex. "he posed her against a background of rolling hills"
background (Noun) — Information that is essential to understanding a situation or problem. ex. "the embassy filled him in on the background of the incident"
background (Noun) — Extraneous signals that can be confused with the phenomenon to be observed or measured. ex. "they got a bad connection and could hardly hear one another over the background signals"
background (Noun) — Relatively unimportant or inconspicuous accompanying situation. ex. "when the rain came he could hear the sound of thunder in the background"
background (Noun) — The state of the environment in which a situation exists. ex. "you can't do that in a university background"
background (Noun) — (computing) the area of the screen in graphical user interfaces against which icons and windows appear.
background (Noun) — Scenery hung at the back of a stage.
background (Noun) — (computing) activity on a computer not requiring user input.
background (Verb) — Understate the importance or quality of.