Tier | Definition of Tier by Merriam-Webster
Definition of tier. (Entry 1 of 3) 1 a : a row, rank, or layer of articles especially : one of two or more rows, levels, or ranks arranged one above another. b : a group of political or geographic divisions that form a row across the map the southern tier of states. 2 : class, category.
DA: 70 PA: 59 MOZ Rank: 21