glass curtain
Curtain placed in front of a window, attached in various ways, in combination or separately.
cottage curtain 
Curtain held to the side by a tieback, usually trimmed with a ruffle.
café curtain 
Curtain whose rod is located halfway up the window; it lets in light while providing privacy.
ruffle 
Pleated or gathered strip of fabric trimming the curtain border.
tieback 
Strip of fabric or rope holding back and supporting a curtain.
valance 
Pleated or gathered strip of fabric hiding the curtain rod.