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