Definition of "tier"
noun:
-
One who ties (knots, etc).
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Something that ties.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A layer or rank, especially of seats or a wedding cake.
from Wiktionary, Creative Commons Attribution/Share-Alike License
-
verb:
-
To arrange in layers.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
To cascade in an overlapping sequence.
from Wiktionary, Creative Commons Attribution/Share-Alike License
-