There are 3 definitions of dam in English:

dam1

Syllabification: dam

noun

1A barrier constructed to hold back water and raise its level, the resulting reservoir being used in the generation of electricity or as a water supply.
More example sentences
  • The dam raised the water level by 54 feet and created a three-mile-long reservoir holding around 9,000 million gallons.
  • By raising the dam, water levels would reach a point where they would flood many of the beach-front properties that sit close to the lake shore.
  • He'll test them on Nile crocodiles in South Africa, which are imperiled because changes to a local dam will raise water levels and swamp nesting beaches.
Synonyms
barrier, wall, embankment, barricade, obstruction
1.1A barrier of branches in a stream, constructed by a beaver to provide a deep pool and a lodge.
More example sentences
  • The trees are used to build lodges and large dams that provide their aquatic habitat.
  • Beaver dams usually stand no more than ten feet (three meters) tall and integrate a series of steps into the slope.
  • Photos from 40 years ago show a common practice of clearing vegetation and beaver dams from streams to help the water run more freely for irrigation.
1.2A rubber sheet used to keep saliva from the teeth during dental operations, or as a prophylactic device during cunnilingus and anilingus.
More example sentences
  • The use of tooth isolation technique using rubber dam material makes the procedure even more fail-proof.

verb (dams, damming, dammed)

[with object] Back to top  
1Build a dam across (a river or lake).
More example sentences
  • Lake Nasser was formed by damming the River Nile.
  • In the Soviet era, the Vakhsh River was dammed for irrigation and electric power, and factories were built along its banks.
  • This is a reservoir of approximately 800 acres formed by damming the River Wolf.
Synonyms
block (up), obstruct, bung up, close
technical occlude
1.1Hold back or obstruct (something): the closed lock gates dammed up the canal
More example sentences
  • If you picture it as water, you can feel where it flows and where it is dammed up or blocked.
  • In valleys, the pollution is effectively dammed up.
  • The flood was dammed, the trickle diminished to a drop here and there as though someone had put a bend in the hose-pipe - which, I suppose, in computer terms, they had.

Origin

Middle English: from Middle Low German or Middle Dutch; related to Dutch dam and German Damm, also to Old English fordemman 'close up'.

Definition of dam in:

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Word of the day inamorata
Pronunciation: inˌaməˈrätə
noun
a person's female lover

There are 3 definitions of dam in English:

dam2

Syllabification: dam

noun

The female parent of an animal, especially a domestic mammal.
More example sentences
  • However, the present study indicates Longhorns have a significant advantage in calving ease over Red Poll sires for dams calving at 2 yr of age.
  • The greatest effect of scours was on young inbred dams; mature outcross dams had a lower incidence of scours.
  • Their incorporation into these pedigree herds as suckler dams or resale as in calf cows offers a very lucrative second-hand value.

Origin

late Middle English (denoting a human mother): alteration of dame.

Definition of dam in: