[adjective] [before noun; not gradable]The ruling body (= group) of the Labour Party were united in their condemnation of the Home Secretary.The Communists are the ruling party at the moment.The ruling class/ruling classes are the most powerful people in a country.His ruling passion (= most important interest) is music.
RULING
Meaning of RULING in English
Cambridge English vocab. Кембриджский английский словарь. 2012