Pronunciation: (kās'munt),[key] —n. 1. a window sash opening on hinges that are generally attached to the upright side of its frame.
2. Also called case'ment win'dow. a window with such a sash or sashes.
3. a casing or covering.
Pronunciation: (kās'munt),[key] —n. (Sir) Roger (David), 1864–1916, Irish patriot: hanged by the British for treason.