caisson

Other forms: caissons

Definitions of caisson

1. noun

   a chest to hold ammunition
   synonyms: ammunition chest

   type of:

   chest

   box with a lid; used for storage; usually large and sturdy
2. noun

   a two-wheeled military vehicle carrying artillery ammunition
   type of:

   military vehicle

   vehicle used by the armed forces
3. noun

   large watertight chamber used for construction under water
   synonyms: cofferdam, pneumatic caisson

   type of:

   chamber

   a natural or artificial enclosed space
4. noun

   an ornamental sunken panel in a ceiling or dome
   synonyms: coffer, lacuna

   type of:

   panel

   sheet that forms a distinct (usually flat and rectangular) section or component of something