1. A unit of length equal to ten metres.
Usage: metric system; also spelled decameter in U.S. English

Examples

• The swimming pool is one decametre long.
• A decametre equals 10 metres or approximately 32.8 feet.
• The field was measured in decametres for the athletic competition.
• In metric units, a decametre is a standard measurement for longer distances.
• The bridge spans several decametres across the river.