TIER


Meaning of TIER in English

/ tɪə(r); NAmE tɪr/ noun

1.

a row or layer of sth that has several rows or layers placed one above the other :

a wedding cake with three tiers

The seating is arranged in tiers .

2.

one of several levels in an organization or a system :

We have introduced an extra tier of administration.

a two-tier system of management

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WORD ORIGIN

late 15th cent.: from French tire sequence, order, from tirer elongate, draw.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.