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- DictionaryHi·er·ar·chy/ˈhī(ə)ˌrärkē/
noun
- 1. a system or organization in which people or groups are ranked one above the other according to status or authority: "the initiative was with those lower down in the hierarchy"
noun
System of elements with multiple levels or tiers that are subordinated to each other
A hierarchy is an arrangement of items (objects, names, values, categories, etc.) that are represented as being "above", "below", or "at the same level as" one another. Hierarchy is an important concept in a wide variety of fields, such as architecture, philosophy, design, mathematics, computer science, organizational theory, systems theory, systematic biology, and the social sciences (especially ... Wikipedia