Definition of backdrop noun from the Oxford Advanced American Dictionary

     

    backdrop

     noun
    noun
    NAmE//ˈbækdrɑp//
     
     
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  1. 1a painted piece of cloth that is hung behind the stage in a theater as part of the scenery
  2. 2everything that can be seen around an event that is taking place, but which is not part of that event The mountains provided a dramatic backdrop for our picnic.
  3. 3the general conditions in which an event takes place, that sometimes help to explain that event It was against this backdrop of racial tension that the civil war began.
See the Oxford Advanced Learner's Dictionary entry: backdrop