cofferdam: meaning, definition, pronunciation and examples
C2/ProfessionalTechnical/Professional
Quick answer
What does “cofferdam” mean?
A temporary watertight enclosure pumped dry to permit construction, inspection, or repair work below the waterline.
Audio
Pronunciation
Definition
Meaning and Definition
A temporary watertight enclosure pumped dry to permit construction, inspection, or repair work below the waterline.
A secondary barrier or compartment designed to prevent the intermixing of two liquids or to isolate a damaged section of a ship.
Dialectal Variation
British vs American Usage
Differences
No significant semantic difference. US usage may more frequently refer to the shipbuilding compartment sense.
Connotations
Technical precision, large-scale construction, safety engineering.
Frequency
Very low frequency in general discourse. Almost exclusively used in engineering, construction, and maritime contexts.
Grammar
How to Use “cofferdam” in a Sentence
VERB + cofferdam: construct, build, install, design, dewater, removecofferdam + VERB: fails, leaks, surrounds, isolatesADJ + cofferdam: temporary, watertight, double-walled, cellularVocabulary
Collocations
Examples
Examples of “cofferdam” in a Sentence
verb
British English
- The engineers decided to cofferdam the entire section of the old pier before demolition.
- They will need to cofferdam that leaky intake valve.
American English
- The contractor cofferdammed the site to begin foundation work.
- We should cofferdam the area before attempting the repair.
adverb
British English
- Not applicable. 'Cofferdam' is not used as an adverb.
American English
- Not applicable. 'Cofferdam' is not used as an adverb.
adjective
British English
- The cofferdam structure must meet strict safety regulations.
- They reviewed the cofferdam design with the client.
American English
- The cofferdam installation was completed ahead of schedule.
- A cofferdam failure could flood the construction site.
Usage
Meaning in Context
Business
Rare. Might appear in project proposals or risk assessments for marine construction.
Academic
Common in civil engineering, maritime archaeology, and naval architecture textbooks and papers.
Everyday
Extremely rare. Unlikely to be used or understood by non-specialists.
Technical
Core term in civil/marine engineering and shipbuilding. Precise and frequent usage.
Vocabulary
Synonyms of “cofferdam”
Vocabulary
Antonyms of “cofferdam”
Watch out
Common Mistakes When Using “cofferdam”
- Misspelling as 'coffer dam' (two words). It is a closed compound.
- Using it to refer to any dam. It is specifically a temporary, pumped-dry enclosure.
- Confusing it with a 'bulkhead', which is a permanent internal wall on a ship.
FAQ
Frequently Asked Questions
No, it is by definition a temporary structure, removed after the underwater or ground-level work is completed.
A cofferdam is typically a temporary barrier built in place (like driving sheets into a riverbed). A caisson is often a prefabricated, watertight chamber that is sunk into place and can become part of the permanent structure (like the foundation for a bridge pier).
Yes, though it is less common. To 'cofferdam' an area means to enclose it with a cofferdam. This usage is primarily technical.
The word originates from 'coffer' (a chest or strongbox) and 'dam'. It conceptually describes a box or chest that holds back water.
A temporary watertight enclosure pumped dry to permit construction, inspection, or repair work below the waterline.
Cofferdam is usually technical/professional in register.
Cofferdam: in British English it is pronounced /ˈkɒf.ə.dæm/, and in American English it is pronounced /ˈkɑː.fɚ.dæm/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. Term is purely technical.”
Learning
Memory Aids
Mnemonic
Think of 'coffee' + 'dam': You build a dam to hold back water so you can work on a bridge pier, just like a coffee dam holds back coffee in a cup. It's a temporary barrier against liquid.
Conceptual Metaphor
A DRY ISLAND WITHIN WETNESS. A cofferdam creates a temporary, artificial 'land' or 'workspace' within the 'sea' of water.
Practice
Quiz
In which of the following scenarios would the use of a 'cofferdam' be MOST appropriate?