1. the act or process of building or constructing battlements or crenellations on a wall or building
Usage: architecture; historical
2. a battlement or series of crenellations; the notched parapet of a fortified wall
Usage: architecture; historical

Examples

• The medieval castle's castellation provided defensive positions for archers.
• The architect designed the tower with elaborate castellation to enhance its fortified appearance.
• Castellation was a common feature of 12th-century fortress design.
• The stone castellation along the castle walls had weathered centuries of exposure.
• The restoration project carefully preserved the original castellation of the ancient keep.