/ˈbækˌɡɹaʊnd/
1.n.a person's social heritage: previous experience or training
“he is a lawyer with a sports background”
2.n.the part of a scene (or picture) that lies behind objects in the foreground
“he posed her against a background of rolling hills”
3.n.information that is essential to understanding a situation or problem
“the embassy filled him in on the background of the incident”