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Definition of "dam" [dam]

  • A barrier constructed across a waterway to control the flow or raise the level of water. (noun)
  • A body of water controlled by such a barrier. (noun)
  • A barrier against the passage of liquid or loose material, as a rubber sheet used in dentistry to isolate one or more teeth from the rest of the mouth. (noun)
  • An obstruction; a hindrance. (noun)
  • To hold back or confine by means of a dam. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "dam" in a sentence
  • "Completed in 1991, the dam is a joint effort of of the governments of Brazil and Paraguay."
  • "Apparently, the dam is already under a lot of stress because of all the silt that the river carries that it used to dump on the floodplain."
  • "And so in China, the army starts displacing villagers to begin what it calls a dam-building project."