Background

Background may refer to:

Art

Background process, software that is running but not being displayed
Background, or desktop picture, is the image or colour displayed on a website or computer desktop behind the visible content
background, in HTML, a <body> element attribute that sets a background texture

Background (astronomy), small amounts of light coming from otherwise dark parts of the sky
Background extinction rate, in geology
Background independence, a condition in theoretical physics
Background noise
Background radiation, the natural radiation that is always present in a location
Cosmic microwave background radiation, a natural constant radiation emanating throughout the universe
Gravitational wave background
Operational definition, in philosophy of science, distinguishing an object from its background of observation, or identifying what is and what is not part of it
String background, in theoretical physics
X-ray background

Background (journalism), in journalism, between a news source and a reporter on the privacy of a discussion
Background art, or prior art, in patent law
Background check
Backgrounding, a way of feeding livestock before selling them
Field (heraldry), background of a shield