n. 1. The act of one who tamps; specifically, the act of filling up a hole in a rock, or the branch of a mine, for the purpose of blasting the rock or exploding the mine. [ 1913 Webster ]
2. The material used in tamping. See Tamp, v. t., 1. [ 1913 Webster ]
Tamping iron, an iron rod for beating down the earthy substance in tamping for blasting. [ 1913 Webster ]