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English definition of “background”

background

noun [C/U] (THINGS BEHIND)   /ˈbækˌɡrɑʊnd/
things that appear to be farther away or behind what is nearer or in front, esp. in a picture: [C] He photographed the models against different backgrounds. [U] With so much noise in the background, I couldn’t hear what she was saying. [C] The city’s skyline was our background. A background can also be whatever is happening around you but not involving you directly: Worry was always part of the background. art In a painting or a story, the background is the people and things that are less important and not the main subject.
(Definition of background noun (THINGS BEHIND) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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