Definition of "clerestory" [clere•sto•ry]

• The upper part of the nave, transepts, and choir of a church, containing windows. (noun)
• An upper portion of a wall containing windows for supplying natural light to a building. (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.

• "I thought the term clerestory window was pronounced like cler-est-or-eee."
• "The eastern part of the clerestory is a modern reproduction of that which superseded Rahere's; but, with this exception, the interior of the choir was probably much the same originally as it is"
• "This applies only to the windows in the aisle; those in the triforium are of three lights, similar to those removed from the aisle; and those in the clerestory are the original Norman, just as on the north side."