Organization of the Petroleum Exporting CountriesPronunciation: /ˈəʊpɛk/ (abbreviation: OPEC /ˈəʊpɛk/)Definition of Organization of the Petroleum Exporting Countries an association of the thirteen major oil-producing countries, founded in 1960 to coordinate policies. Its headquarters are in Vienna. Organization of the Petroleum Exporting Countries in other Oxford dictionaries Definition of Organization of the Petroleum Exporting Countries in the US English dictionary
