Sentence:  Hoag pushed open the door : at the far end of the long dark room Muller was faintly silhouetted against the <WSD>window</WSD> , the rifle still raised ; he stood with his feet apart on a kitchen table he had dragged to the sill . 
Meaning of the word marked with <WSD> tags:  a framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air