n.the most important league in any sport (especially baseball)

同義詞：major leaguemajors

The changing fanscape for big-league sports: implications for sport managers.
Caruso Faring Well in First Big-League Season
From Little League to big league, the weak spot is the arm
France's sequencers aim to join the big league
Called up to the big leagues: an examination of the factors affecting the location of minor league baseball teams.
General practice research: in the big league at last?
Stadium Games: Fifty Years of Big League Greed and Bush League Boondoggles
Small Developing Countries and Global Markets: Competing in the Big League
Stadium Games:Fifty Years of Big League Greed and Bush League Boondoggles
Thinking small, but with big league consequences: procoagulant microparticles in the alveolar space