■ noun
1》 part of a scene, picture, or description that forms a setting for the main figures, events, etc.
2》 the circumstances prevailing at a particular time or underlying an event.
↘a person's education, experience, and social circumstances.
3》 a persistent low level of radioactivity, radiation, noise, etc. present in an environment.
4》 tasks or processes running on a computer that do not need input from the user.
■ verb
1》 form a ~ to.
2》 put in the ~.
3》 provide with ~ information.