Tamping \Tamp"ing\, 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. 2. The material used in tamping. See {Tamp}, v. t., 1. {Tamping iron}, an iron rod for beating down the earthy substance in tamping for blasting.