An Encylopedia Britannica Company

big league

1 ENTRIES FOUND:
big league noun
big league
noun
Britannica Dictionary definition of BIG LEAGUE

the big leagues

US
: the two main U.S. baseball leagues (the American League and the National League)
often used figuratively

— big–league

adjective, always used before a noun

— big leaguer

noun, plural big leaguers [count]