(noun.) (computer science) the area of the screen in graphical user interfaces against which icons and windows appear.
(noun.) a person's social heritage: previous experience or training; 'he is a lawyer with a sports background'.
(noun.) information that is essential to understanding a situation or problem; 'the embassy filled him in on the background of the incident'.
(noun.) the part of a scene (or picture) that lies behind objects in the foreground; 'he posed her against a background of rolling hills'.
(noun.) relatively unimportant or inconspicuous accompanying situation; 'when the rain came he could hear the sound of thunder in the background'.
(noun.) 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'.
(verb.) understate the importance or quality of; 'he played down his royal ancestry'.
整理:纳撒尼尔
校对:朱莉娅