1. a series of rectangular notches or indentations along the top of a wall or parapet, especially on medieval fortifications
Usage: architecture; fortification
2. any similar pattern of regular notches or indentations

Examples

• The castle’s crenelation provided protection for archers defending the walls.
• Medieval fortifications are easily recognized by their distinctive crenelation.
• The architect incorporated crenelation into the modern building’s design as a decorative element.
• Soldiers could fire arrows through the gaps in the crenelation while staying protected.
• The leaf’s edge showed a natural crenelation pattern.
• The old fortress walls still displayed their original crenelation after centuries.