damming,vbl.n.|ˈdæmɪŋ| [-ing1.] The action of the verb dam1; obstructing or confining by a dam. (Also with up.) 1802Playfair Illustr. Hutton. Th. 353 The damming up of those rivers.1861Hughes Tom Brown at Oxf. xvii. (1889) 162 A small brook..with careful damming is made to turn a mill.