noun \ˈkā-ˌsän, -sən, British also kə-ˈsün\

Definition of CAISSON

a :  a chest to hold ammunition
b :  a usually 2-wheeled vehicle for artillery ammunition attachable to a horse-drawn limber; also :  a limber with its attached caisson
a :  a watertight chamber used in construction work under water or as a foundation
b :  a hollow floating box or a boat used as a floodgate for a dock or basin
:  coffer 3

Illustration of CAISSON

Origin of CAISSON

French, from Middle French, from Old Occitan, from caissa chest, from Latin capsa — more at case
First Known Use: circa 1702

Other Military Terms

bivouac, logistics, petard, salient, sally, supernumerary, tactical

Rhymes with CAISSON


noun    (Concise Encyclopedia)

In engineering, a type of foundation most commonly used underwater for a bridge, but sometimes used in building construction. It is a large hollow structure that is sunk down through the earth by workers excavating from inside it; ultimately it becomes a permanent part of the pier. There are three types: the open caisson, open at both top and bottom; the box caisson, closed at the bottom; and the pneumatic caisson, with an airtight chamber to accommodate submerged workers. Caisson columns, typically 2 ft (0.6 m) or more in diameter, may be used as an alternative to bearing piles. A round hole is dug or bored to a stable layer of earth and temporarily supported by a steel shell, then filled with concrete poured around a cage of reinforcing bars.


Next Word in the Dictionary: caisson crib
Previous Word in the Dictionary: cairn terrier
All Words Near: caisson

Seen & Heard

What made you want to look up caisson? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More