Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “dam”


noun [C]
a strong wall built across a river to stop the water and make a lakeDitches, dams and tunnels
dam verb [T] (present participle damming, past tense and past participle dammed) to build a dam across a riverDitches, dams and tunnels
(Definition of dam from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Definitions of “dam” in other dictionaries

Word of the Day


a measure for liquid equal to about half a litre

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More