What "big leagues" means in baseball

In baseball, "big leagues" is a term used to refer to Major League Baseball (MLB), the highest level of professional baseball in North America. To make it to the big leagues, players must work their way up through a system of minor leagues, showcasing their talent and skills before being drafted by an MLB team. Being in the big leagues signifies that a player has reached the pinnacle of their profession and is playing at the highest level of competition.