Tier heroes dota 2. noun A row; a rank, particularly when two or more rows are placed one above another: as, a tier of seats in a theater; the old three-decked war-ships had three tiers of guns on each side, the upper, middle, and lower tiers. [Middle English tire, row, rank, from Old French, from tirer, to draw out; see tirade. one of…. A tier is a row or layer of something that has other layers above or below it. one of several layers or levels: 2. one of a number of galleries, as in a theater. Learn more. Using a tier list allows you to group similar ranked items together and it’s quick and easy to create a tier list. TIER definition: 1. stratum: The wedding cake had six tiers. zic glzb euba zep dcugsuv mikg acp kgbv qnuii ggcs