big' league'1. Sports.
See major league.
Often, big leagues. Informal.
the area of greatest competition, highest achievement or rewards, etc.: He's a local politician who isn't ready for the big league.
big-leaguePronunciation: (big'lēg'), [key]
of or belonging to a major league: a big-league pitcher.
among the largest, foremost, etc., of its kind: the big-league steel companies.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.