- a structure used in underwater work, consisting of an airtight chamber, open at the bottom and containing air under sufficient pressure to exclude the water.
- a boatlike structure used as a gate for a dock or the like.
- Nautical.
- a float for raising a sunken vessel, sunk beside the vessel, made fast to it, and then pumped out to make it buoyant.
- a watertight structure built against a damaged area of a hull to render the hull watertight; cofferdam.
- a two-wheeled wagon, used for carrying artillery ammunition.
- an ammunition chest.
- a wooden chest containing bombs or explosives, used formerly as a mine.
- coffer (def. 4).
- a watertight chamber open at the bottom and containing air under pressure, used to carry out construction work under water
- a similar unpressurized chamber
- a watertight float filled with air, used to raise sunken ships
- a watertight structure placed across the entrance of a basin, dry dock, etc, to exclude water from it
- a box containing explosives, formerly used as a mine
- an ammunition chest
- a two-wheeled vehicle containing an ammunition chest
- another name for coffer (def. 3)
