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noun
an organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum
• Hypernyms: ↑world organization, ↑world organisation, ↑international organization, ↑international organisation, ↑global organization, ↑oil cartel
• Member Meronyms:
↑Algeria, ↑Algerie, ↑Democratic and Popular Republic of Algeria, ↑Egypt, ↑Arab Republic of Egypt, ↑United Arab Republic, ↑India, ↑Republic of India, ↑Bharat, ↑Indonesia, ↑Republic of Indonesia, ↑Dutch East Indies, ↑Iran, ↑Islamic Republic of Iran, ↑Persia, ↑Iraq, ↑Republic of Iraq, ↑Al-Iraq, ↑Irak, ↑Kuwait, ↑State of Kuwait, ↑Koweit, ↑Libya, ↑Socialist People's Libyan Arab Jamahiriya, ↑Qatar, ↑State of Qatar, ↑Katar, ↑State of Katar, ↑Saudi Arabia, ↑Kingdom of Saudi Arabia, ↑United Arab Emirates, ↑Venezuela, ↑Republic of Venezuela
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/oh"pek/, n.
an organization founded in 1960 of nations that export large amounts of petroleum: formed to establish oil-exporting policies and set prices.
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OPEC /ōˈpek/
abbrev
Organization of the Petroleum Exporting Countries
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OPEC UK [ˈəʊpek] US [ˈoʊˌpek]
Organization of Petroleum Exporting Countries: an organization that controls the supply and price of oil in the world market 
http://www.macmillandictionary.com/med2cd/weblinks/opec.htm
http://www.macmillandictionary.com/med2cd/weblinks/opec.htmThesaurus: drilling for oilhyponym
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O|pec or OPEC «OH pehk», noun, or O.P.E.C.
Organization of Petroleum Exporting Countries.
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['ōpek]abbr. Organization of the Petroleum Exporting Countries
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/ˈoʊˌpɛk/ abbr
Organization of Petroleum Exporting Countries
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Organization of Petroleum Exporting Countries (an organization of countries that produce and sell oil)
Useful english dictionary. 2012.