American English

Definition of ascendancy noun from the Oxford Advanced American Dictionary

 

ascendancy

 noun
(also ascendency) noun
NAmE//əˈsɛndənsi//
 
[uncountable] ascendancy (over somebody/something) (formal)
 
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the position of having power or influence over someone or something moral/political/intellectual ascendancy The opposition party was in the ascendancy (= gaining control).
See the Oxford Advanced Learner's Dictionary entry: ascendancy