any of the open spaces between the merlons of a battlement.
- Also cre·nelle [kri-nel]. /krɪˈnɛl/.
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British Dictionary definitions for crenel
any of a set of openings formed in the top of a wall or parapet and having slanting sides, as in a battlement
another name for crenation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012