1. a row or level of a structure, typically one of a series of rows placed one above the other and successively receding or diminishing in size: "a tier of seats"Similarrowrankbanklinelayerlevelplanefloorstorydeck
▪ one of a number of successively overlapping ruffles or flounces on a garment: "a full skirt gathered into three tiers"
▪ a level or grade within the hierarchy of an organization or system:"companies have taken out a tier of management to save money"Similargradegradationstepechelonpoint on the scalerung on the ladderarchaic:degree
Word Originlate 15th century: from French tire ‘sequence, order’, from tirer ‘elongate, draw’.
