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supremacy

noun [U] (HIGHEST)
 
 
/suːˈprem.ə.si/

Definition

the leading or controlling position: The company has begun to challenge the supremacy of the current leading manufacturers in the textiles industry. The allies have established air supremacy (= military control of the sky).ImportanceUseful or advantageous
(Definition of supremacy noun (HIGHEST) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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