1. one of the open spaces between the solid portions (merlons) of a battlement on top of a castle wall or fortification
Usage: architecture; fortification

1. to furnish with crenels; to make battlements
Usage: architecture; rare

Examples

• The archers positioned themselves behind the crenels of the castle wall.
• Each crenel provided a narrow opening for defenders to shoot through.
• The medieval fortress featured perfectly spaced crenels along its battlements.
• Sunlight streamed through the crenels, casting shadows on the courtyard below.
• The mason carefully creneled the top of the defensive wall.
• Workers began to crenel the newly built fortification.