Definitions

1. noun

A structure built around a ship or other vessel to prevent water from entering while repairs are being made or the vessel is being constructed.

“The construction of the cofferdam was crucial for the successful completion of the ship repair project.”

2. noun

A watertight enclosure used for excavation or other work in water, typically made of steel or wood.

“The cofferdam allowed the engineers to dig the canal without flooding the surrounding area.”