[1] : The Collaborative International Dictionary of English v.0.48

dam \dam\, v. t. imp.  p. p. dammed da^md; p. pr.  vb.
   n. damming.
   1. to obstruct or restrain the flow of, by a dam; to confine
      by constructing a dam, as a stream of water; -- generally
      used with in or up.
      1913 webster

            i'll have the current in this place dammed up.
                                                  --shak.
      1913 webster

            a weight of earth that dams in the water.
                                                  --mortimer.
      1913 webster

   2. to shut up; to stop up; to close; to restrain.
      1913 webster

            the strait pass was dammed
            with dead men hurt behind, and cowards. --shak.
      1913 webster

   to dam out, to keep out by means of a dam.
      1913 webster
see also:
dammed damming to dam out 

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