backcloth

noun
1
a painted piece of cloth that is hung behind the stage in a theatre as part of the scenery
پردهٔ پشت صحنه, پردهٔ نقاشی‌شده
2
everything that can be seen around an event or scene
پس زمینه, زمینه, محیط
3
the general conditions in which an event takes place, which sometimes help to explain that event
زمینه, پس‌زمینه