Originally from the theatre
. A backdrop is a painted cloth in front of which the actor
.Now a backdrop is taken less literally to mean the background
to many things. For example a political
backdrop is the history of a topic in front of which a current affair is played out. “Shares were a touch firmer in opening trade on Tuesday, despite the cloudy backdrop provided by global markets.
” (from BBC news online.)A backdrop can also used to describe the background
picture displayed on a computer desktop