Definitions
1.nounOne who ties (knots, etc).
2.nounSomething that ties.
3.nounA child's apron.
4.nounA layer or rank, especially of seats or a wedding cake.
5.verbTo arrange in layers.
6.verbTo cascade in an overlapping sequence.
7.verbTo move (data) from one storage medium to another as an optimization, based on how frequently it is accessed.