Definitions

1. noun

A unit of length in the metric system, equal to ten metres.

“The tunnel was 100 decametres long.”

2. noun

A unit of area in the metric system, equal to 100 square metres.

“The park covered 50 decametres of land.”

3. noun

A unit of volume in the metric system, equal to 10 cubic metres or 10,000 litres.

“The water tank had a capacity of 5 decametres.”