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A rib vault in which slender curving ribs radiate upward from the top of a column like the ribs of a fan to form inverted half cones. Common in late English Gothic architecture, fan vaults are often decorated with intricate tracery or paneling.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a vault composed of a number of concave conoid surfaces touching or intersecting at the top, with curved fanlike ribs radiating from the spring.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.