Definitions of tier:
- noun: one of two or more layers one atop another
Example: "Tier upon tier of huge casks"
- noun: something that is used for tying
Example: "The sail is fastened to the yard with tiers"
- noun: a worker who ties something
- noun: any one of two or more competitors who tie one another
- noun: a relative position or degree of value in a graded group
- name: A surname (very rare: popularity rank in the U.S.: #41849)