Curtain \Cur"tain\, v. t. [imp. & p. p. {Curtained} (-t?nd; 48); p. pr. & vb. n. {Curtaining}.] To inclose as with curtains; to furnish with curtains. So when the sun in bed Curtained with cloudy red. --Milton.
curtained adj : furnished or concealed with curtains or draperies; "a curtained alcove" [ant: {curtainless}]