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Definition of tier:

  1. A chold's apron covering the upper part of the body, and tied with tape or cord; a pinafore.
  2. A row or rank, especially one of two or more rows placed one above, or higher than, another; as, a tier of seats in a theater.
  3. One who, or that which, ties.


score, string, horizontal surface, degree, file, class, spirit level, rank, bracket, stage, queue, order, line, storey, group, grad, stratum, range, tier up, league, course, point, floor, column, row, grade, ground level, form, level, value, mark, line, gradation.

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