'curtainless' definitions:

Definition of 'curtainless'

(from WordNet)
adjective
Not provided with curtains; "blank, curtainless windows stared back at her" [syn: curtainless, uncurtained] [ant: curtained]

Definition of 'curtainless'

From: GCIDE
  • curtainless \curtainless\ adj. not provided with curtains; as, blank, curtainless windows stared back at her. Opposite of curtained.
  • Syn: uncurtained. [WordNet 1.5]