General English


  • noun a construction built to block a river in order to channel the flow of water into a hydroelectric power station or to regulate the water supply to an irrigation scheme
  • noun the female parent of an animal, usually a domestic animal


  • The barrier built into the trapway of a toilet that controls the water level in the toilet bowl.


  • noun a barrier designed to restrict the flow of water, in order to make a reservoir or to prevent flooding

Origin & History of “dam”

Dam, appropriately enough for a word related to the human control of water-courses, seems to have been borrowed from middle Dutch dam. It appears to have been a fairly widespread west and east Germanic word, subsequently borrowed into north Germanic, but its ultimate source is not known.