1.A window sash (ventilator, 2) which swings open along its entire length; usually on hinges fixed to the sides of the opening into which it is fitted; see casement window.
2. A deep hollow molding, used chiefly in cornices.
1.A window sash (ventilator, 2) which swings open along its entire length; usually on hinges fixed to the sides of the opening into which it is fitted; see casement window.
2. A deep hollow molding, used chiefly in cornices.