(n.) A water-tight inclosure, as of piles packed with clay, from which the water is pumped to expose the bottom (of a river, etc.) and permit the laying of foundations, building of piers, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). cofferdam. Retrieved September 23, 2026, from http://smartdefine.org/cofferdam/definitions/1988747 |
| Chicago | Webster's. 2011. "cofferdam" http://smartdefine.org/cofferdam/definitions/1988747 (accessed September 23, 2026). |
| Harvard | Webster's 2011, cofferdam, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/cofferdam/definitions/1988747>. |
| MLA | Webster's. "cofferdam" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/cofferdam/definitions/1988747> |