An example of a tier is a mother who helps a child with the laces of their shoes.
An example of a tier is an upper level of chairs in a theater.
An example of a tier is one of three layers of a wedding cake.
A stadium with four tiers of seats.
Tier a wedding cake; balconies that tier upward.
A tier of knots.
A three-tiered wedding cake, one-tier tax system.