1the part of a picture, scene, or design that forms a setting for the main figures or objects, or appears furthest from the viewer:the house stands against a background of sheltering treesthe word is written in white on a red background
a less important or conspicuous position or function:after that evening, she remained in the background
Computing used in reference to tasks or processes that do not need input from the user:programs can be left running in the background
Physics low-intensity radiation from radioisotopes present in the natural environment.
unwanted signals, such as noise in the reception or recording of sound.
2the circumstances or situation prevailing at a particular time or underlying a particular event:the political and economic background [as modifier]:background information
a person’s education, experience, and social circumstances:she has a background in nursingher voice suggested a tenacious, working-class background
1form a background to:windswept land backgrounded by the Rockies
2provide with background:the embassy backgrounded American reporters
background in other Oxford dictionaries
Definition of background in the US English dictionary