1. a person or thing that dams; one who builds or maintains a dam
2. a resinous substance used in varnishes and lacquers, obtained from certain trees
Usage: technical; also called dammar

Examples

• The dammer worked on reinforcing the structure of the old dam.
• Beavers are natural dammers, building dams across streams.
• The varnish maker used dammer as a key ingredient in the finish.
• Colonial craftsmen imported dammer from Southeast Asia for fine woodwork.