G20 or G-20 may refer to:* G-20 major economies, an economic forum consisting of 19 of the world's largest economies, plus the European Union 2006 G-20 ministerial meeting, a meeting of the G-20 finance ministers and central bank governors on November 18–19, 2006 in Melbourne, Australia 2008 G-20 Washington summit, a meeting of the G-20 heads of state on November 14-15, 2008 in Washington 2009 G-20 London summit, a meeting of the G-20 heads of state on April 1-2, 2009 in London 2009 G-… (More on G20)