Big Three

Proper noun

 * 1)  The World War II military alliance consisting of the Soviet Union, the United States, and the United Kingdom.
 * 2)  The leaders of that World War II military alliance: Joseph Stalin, Franklin Roosevelt and Winston Churchill.
 * 3) Any group of three major or largest corporations in a given, especially when such a small group has  or near-oligopoly; as:
 * 4)  The three major traditional commercial broadcast television networks in the United States: CBS (the Columbia Broadcasting System), NBC (the National Broadcasting Company), and ABC (the American Broadcasting Company)
 * 5)  During the mid- to late twentieth century, the three biggest  corporations in North America: General Motors, Ford, and Chrysler.
 * 6)  China, Japan, and Korea, three major Asian economies.
 * 7)  The deadlift, squat and benchpress.