D defs.my
Entry 2 senses Webster, 1913

backdrop

· back·drop · IPA /ˈbæk.dɹɑp/
01 n. the scenery hung at back of stage. Also called in Britain backcloth.
  1. 1.
    the scenery hung at back of stage. Also called in Britain backcloth. Also: backcloth
  2. 2.
    the background, setting, or circumstances of an event; as, the backdrop for the summit meeting.