n. The act of stratifying, or the state of being stratified; formation or arrangement in layers.n. Specifically, in geology, deposition in beds or strata: the mode of occurrence of those rocks which have been laid down or spread over the surface by water.n. In physiology, the thickening of a cell-wall by the deposition of successive thin layers of formed material; also, the arrangement of the layers so deposited.n. In electricity, the appearance presented by an electric discharge, or a series of rapid discharges, in a rarefied gas, light and dark bands or striæ being produced.