Definitions
1.NounA (permanent) enclosure from which water can be expelled, in order to give access to underwater areas for engineering works etc.
2.NounA structure with similar function that is temporary.
3.NounA coffer (sunken panel).
4.NounThe gate across the entrance to a drydock.
5.NounA floating tank that can be submerged, attached to an underwater object and then pumped out to lift the object by buoyancy.
6.NounA two-wheeled, horse-drawn military vehicle used to carry ammunition (and a coffin at funerals).
7.NounA large box to hold ammunition.
8.NounA chest filled with explosive materials, used like a mine.