from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A watertight structure within which construction work is carried on under water.
  • n. See camel.
  • n. A large box open at the top and one side, designed to fit against the side of a ship and used to repair damaged hulls under water.
  • n. A floating structure used to close off the entrance to a dock or canal lock.
  • n. A horse-drawn vehicle, usually two-wheeled, used to carry artillery ammunition and coffins at military funerals.
  • n. A large box used to hold ammunition.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An enclosure, from which water can be expelled, in order to give access to underwater areas for engineering works etc.
  • n. The gate across the entrance to a dry dock.
  • n. A floating tank that can be submerged, attached to an underwater object and then pumped out to lift the object by buoyancy; a camel.
  • n. A two-wheeled, horse-drawn military vehicle used to carry ammunition (and a coffin at funerals).
  • n. A large box to hold ammunition.
  • n. A variant of coffer.

from the GNU version of the Collaborative International Dictionary of English

  • n.
  • n. A chest to hold ammunition.
  • n. A four-wheeled carriage for conveying ammunition, consisting of two parts, a body and a limber. In light field batteries there is one caisson to each piece, having two ammunition boxes on the body, and one on the limber.
  • n. A chest filled with explosive materials, to be laid in the way of an enemy and exploded on his approach.
  • n.
  • n. A water-tight box, of timber or iron within which work is carried on in building foundations or structures below the water level.
  • n. A hollow floating box, usually of iron, which serves to close the entrances of docks and basins.
  • n. A structure, usually with an air chamber, placed beneath a vessel to lift or float it.
  • n. A sunk panel of ceilings or soffits.

from The Century Dictionary and Cyclopedia

  • n. Milit.: A wooden chest into which several bombs are put, and sometimes gunpowder, to be exploded in the way of an enemy or under some work of which he has gained possession.
  • n. An ammunition-wagon; also, an ammunition-chest.
  • n. In architecture, a sunken panel in a coffered ceiling or in the soffit of Roman or Renaissance architecture, etc.; a coffer; a lacunar. See cut under coffer.
  • n. In civil engineering: A vessel in the form of a boat, used as a flood-gate in docks.
  • n. An apparatus on which vessels may be raised and floated; especially, a kind of floating dock, which may be sunk and floated under a vessel's keel, used for docking vessels at their moorings, without removing stores or masts. (See floating dock, under dock.)
  • n. A water-tight box or casing used in founding and building structures in water too deep for a coffer-dam, such as piers of bridges, quays, etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. large watertight chamber used for construction under water
  • n. an ornamental sunken panel in a ceiling or dome
  • n. a chest to hold ammunition
  • n. a two-wheeled military vehicle carrying artillery ammunition


from The American Heritage® Dictionary of the English Language, 4th Edition

French, from Old French, large box, alteration (influenced by caisse, chest) of casson, from Italian cassone, augmentative of cassa, box, from Latin capsa.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From French caisson.



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  • "Eddie peered at the huge concrete caissons to which the main cables were anchored and thought the one on the right side of the bridge looked as if it had been pulled part way out of the earth." From The Wastelands by Stephen King.

    January 3, 2011

  • It goes rolling along.

    October 26, 2007