noun: (historical) The four top Allied powers of World War I and their leaders: David Lloyd George of Britain, Georges Clemenceau of France, Vittorio Emanuele Orlando of Italy, Woodrow Wilson of the United States, who met at the Paris Peace Conference in 1919 at Versailles.
noun: A group of four entrepreneurs who formed the Central Pacific Railroad.
noun: (music) A jazz rhythm derived from the marching band beat.
noun: (finance) The four largest banks in any of various countries, or (internationally) the Federal Reserve, People's Bank of China, Bank of Japan, and European Central Bank.
noun: (business, accounting) The four largest global auditing firms, comprising Deloitte, Ernst & Young, KPMG, and PricewaterhouseCoopers.
