Casement window, with latticed lights. A casement is a window that is attached to its frame by one or more hinges. Casement windows are hinged at the side. Windows hinged at the top are referred to as awning windows, and ones hinged at the bottom are called hoppers.
Open Systems. The ocean is an open system. The ocean is an example of an open system. The ocean is a component of the hydrosphere and the ocean surface represents the interface between the hydrosphere and the atmosphere that lies above. Solar radiation passes through the atmosphere and is absorbed by the ocean.
The definition of open is someone or something which is not closed, not enclosed or not sealed. An example of an open business is one that is accepting customers. An example of an open container is a container with the lid off.