backcloth
/ˈbækklɒf/Definitions
1. noun
A large piece of fabric or other material hung or stretched behind a stage, screen, or other background to form a backdrop for performances, exhibitions, or displays.
“The theatre company used a beautiful backcloth to create an immersive atmosphere for their play.”
2. noun
A background or context for an idea, situation, or event.
“The economic situation was the backcloth for the company’s decision to downsize.”