hierarchy
//ˈhaɪəˌrɑːrki//
Noun
hierarchySingular
hierarchiesPlural
1
A system or organization in which people or groups are ranked one above the other according to status, authority, or power.
The company has a strict hierarchy, with the CEO at the top.
2
An arrangement or classification of things according to relative importance or inclusiveness.
The library uses a hierarchy to organize books by subject and importance.
3
The upper echelons of a hierarchical system; those in authority.
The company hierarchy approved the new policy.