1. to decorate (a surface, especially metal) with a wavy or scalloped edge; to indent or notch the edge of something in a decorative pattern
Usage: heraldry; archaic or specialized

Examples

• The craftsman engrails the silver plate with an intricate wavy border.
• Medieval artisans would engrails the edges of shields for decorative effect.
• The heraldic design engrails the coat of arms with a distinctive scalloped pattern.