ruling
adj. US //ˈɹuɫɪŋ// UK //ɹˈuːlɪŋ// rul·ing
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1 in power (adj.) B2 Upper Intermediatedescribing a person, group, or party that is currently in control of a country or organization.
exercising control or authority; currently reigning or governing.
ExampleThe ruling party has promised to lower taxes before the next election.
ExampleThe ruling coalition faced significant internal pressure to reform the healthcare system before the parliamentary session concluded.
By surface analysis, rule + -ing.