noun
tier
TEER/tɪr/
A level, rank, or layer in an ordered arrangement.
The theater's upper tier offers a clear view of the stage.

Etymology
Old French tire meant a rank or ordered sequence. English used the word especially for rows arranged one above another, connecting physical arrangement with levels in an ordered system.
In context
three levels of membership from admirer to enthusiast to devotee with different benefits offered at each tier
More examples
- The wedding cake has three tiers.
- The basic subscription tier includes unlimited music.
- Only the highest tier of management can approve these expenses.
Forms
tier · tiers