Definition of "lunette" [lu•nette]

• Architecture A small, circular or crescent-shaped opening in a vaulted roof. (noun)
• Architecture A crescent-shaped or semicircular space, usually over a door or window, that may contain another window, a sculpture, or a mural. (noun)
• A fortification that has two projecting faces and two parallel flanks. (noun)
• A broad, low-lying, typically crescent-shaped mound of sandy or loamy matter that is formed by the wind, especially along the windward side of a lake basin. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Round the upper edge of the lunette is a broad band of oak-leaves, and fruits of various kinds."
• "[49] A lunette is a small picture, generally semicircular, surmounting the main picture in an altar-piece."
• "The eastern side of the lunette is the deposition zone for wind-borne sediments."