Tier

noun
1.
one of a series of rows or ranks rising one behind or above another, as of seats in an amphitheater, boxes in a theater, guns in a man-of-war, or oars in an ancient galley.
2.
one of a number of galleries, as in a theater.
3.
a layer; level; stratum:
The wedding cake had six tiers. All three tiers of the firm’s management now report to one director.
4.
Australian. a mountain range.
verb (used with object)
5.
to arrange in tiers.
verb (used without object)
6.
to rise in tiers.
noun
1.
a person or thing that ties.
2.
Nautical. a short rope or band for securing a furled sail.
3.
New England. a child’s apron or pinafore.
noun
1.
one of a set of rows placed one above and behind the other, such as theatre seats
2.

a layer or level
(in combination): a three-tier cake

3.
a rank, order, or row
verb
4.
to be or arrange in tiers
noun
1.
a person or thing that ties