heavyweight
n. countablen. someone or something that has a lot of power, influence, or importance in a certain area. It also refers to a person who competes in the heaviest weight class in sports like boxing.
n. a person or thing of great importance, influence, or ability within a specific field; also, a competitor in the heaviest weight division of a sport. Often used metaphorically in business or political contexts.
The company is a heavyweight in the tech industry.
As a political heavyweight, her endorsement is enough to change the course of the entire election.
The merger of the two pharmaceutical heavyweights created a global entity with enough capital to dominate the research and development of new vaccines for decades.
From heavy + weight.
Often used as a modifier before another noun (e.g., 'heavyweight champion' or 'heavyweight politician').