Main Entry: ¹tier

Pronunciation: \ˈtir\

Function: noun

Etymology: Middle French tire rank, from Old French — more at attire

Date: 1569

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