big three

Short definition from Wiktionary

Noun

1. 1
   Alternative form of Big Three.

Proper noun

1. 1
   The World War II military alliance consisting of the Soviet Union, the United States, and the United Kingdom.
2. 2
   The World War II military alliance consisting of the Soviet Union, the United States, and the United Kingdom: The leaders of that alliance: Joseph Stalin, Franklin Roosevelt, and Winston Churchill.
3. 3
   Any group of three major or largest corporations in a given industry, especially when such a small group has oligopoly or near-oligopoly; as: 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)
4. 4
   Any group of three major or largest corporations in a given industry, especially when such a small group has oligopoly or near-oligopoly; as: During the mid- to late twentieth century, the three biggest automaker corporations in North America: General Motors, Ford, and Chrysler.
5. 5
   Any group of three major or largest corporations in a given industry, especially when such a small group has oligopoly or near-oligopoly; as: A trio of three major management consultancies: McKinsey & Company, Boston Consulting Group, and Bain & Company.
6. 6
   China, Japan, and Korea, three major Asian economies.
7. 7
   The deadlift, squat and benchpress.
8. 8
   Novak Djokovic, Roger Federer, and Rafael Nadal, each considered to be among the greatest tennis players of all time.