An indentation in the battlements of a fort or castle, used for shooting or firing missiles through.
- ‘Peaked ears appeared along the wall, weapons raised to crenelles.’
- ‘Ramirez ducked behind a crenel, pulling Rakael down with him into an undignified heap.’
- ‘Further above, on a bit of wall still more or less intact, the sentry stood straddle-legged in an open crenel, hands on hips, surveying the river and the valley beyond.’
Late 15th century: from Old French, based on popular Latin crena notch.