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English definition of “hierarchy”

hierarchy

noun [C] uk   /ˈhaɪə.rɑː.ki/ us    /ˈhaɪr.ɑːr-/
C2 a system in which people or things are arranged according to their importance: Some monkeys have a very complex social hierarchy. He rose quickly through the political hierarchy to become party leader. the people in the upper levels of an organization who control it
hierarchical
adjective uk   /ˌhaɪəˈrɑː.kɪ.kəl/ us    /ˌhaɪrˈɑːr-/
C2 It's a very hierarchical organization in which everyone's status is clearly defined.
hierarchically
adverb uk   /ˌhaɪəˈrɑː.kɪ.kəl.i/ us    /ˌhaɪrˈɑːr-/
The company is hierarchically structured.
(Definition of hierarchy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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