Casement definition a window sash opening on hinges that are generally attached to the upright side of its frame.
													
																	Casement window sash definition. 
									
	
		
	
																	Unlike the sash of a traditional sliding window which hangs in a window frame by ropes weights or other devices a casement window is permanently mounted into a space. 
																	Operated by a hand crank a casement windowpane extends open away from the home to catch breezes. 
																	A window with such sashes. 
																	Hinged at the top. 
															
													
									
	
		
	
																	A casement window is another extremely popular window type among homeowners available in wood fiberglass and vinyl. 
																	They are used singly or in pairs within a common frame in which case they are hinged on the outside. 
																	The crank allows homeowners to direct how much air enters the home. 
																	Casement windows are often held open using a casement stay. 
															
													
									
	
		
	
																	A case or covering. 
																	Windows hinged at the top are referred to as awning windows and ones hinged at the bottom are called hoppers. 
																	A window sash that opens outward by means of hinges. 
																	A window sash is not the entire window since a window may be composed of more than one window sash.