curtain /ˈkɜː.tən/ aep /ˈkɝː.t̬ən/ noun [C]
A2 a piece of material, especially cloth, that hangs across a window or opening to make a room or part of a room dark or private:
» Heavy curtains blocked out the sunlight.» to draw (= open or close) the curtainsSee picture: net curtain 
Thesaurus+: ↑Curtains and wallpaper
F0 a thick layer of something that makes it difficult to see anything behind it:
» They could see nothing through the curtain of rain/smoke.Thesaurus+: ↑Coverings and layersF0 the large screen of heavy material in a theatre that separates the stage from the area where people are watching
Thesaurus+: ↑Theatres, cinemas and their parts• • •
Extra Examples:» The audience was still laughing as the curtain fell.» He pulled the curtain aside.» I'm trying to match up this wallpaper with some suitable curtain material.» A coat of paint and new curtains would really cheer the kitchen up.» I peered through a chink in the curtains and saw them all inside.