American English

Definition of tier noun from the Oxford Advanced American Dictionary



    jump to other results
  1. 1a row or layer of something that has several rows or layers placed one above the other a wedding cake with three tiers The seating is arranged in tiers.
  2. 2one of several levels in an organization or a system We have introduced an extra tier of administration. a two-tier system of management
See the Oxford Advanced Learner's Dictionary entry: tier