|1.||a barrier of concrete, earth, etc, built across a river to create a body of water for a hydroelectric power station, domestic water supply, etc|
|2.||a reservoir of water created by such a barrier|
|3.||something that resembles or functions as a dam|
|—vb (often foll by up) , dams, damming, dammed|
|4.||to obstruct or restrict by or as if by a dam|
|[C12: probably from Middle Low German; compare Old Icelandic damma to block up]|
A barrier against the passage of liquid or loose material, especially a rubber sheet used in dentistry to isolate one or more teeth from the rest of the mouth.
Dam (dām, däm), (Carl Peter) Henrik. 1895-1976.
Danish biochemist. He shared a 1943 Nobel Prize for the discovery of vitamin K.