Longman Dictionary of Contemporary English
The Collaborative International Dictionary
major-league \major-league\, major league \major league\a.
Of or pertaining to a major league; as, major-league football rules.
Among the best or most important of its class; as, a major-league computer manufacturer.
Wiktionary
a. 1 (context sports English) Of or belonging to the professional level of a sport, particularly baseball in the United States. 2 By extension, high-level, significant.
Usage examples of "major-league".
A young Cameroonian named Pierre Njanka, with no major-league experience, made his way through the entire Austrian team, his eyes wide as he ducked and swerved, stumbling forward, out of control, hardly believing what he was accomplishing, and then scored.
I spent a lot of years with these people, and you have no idea what major-league phonies they can be.
It's as if you decided to prepare a major-league ball club for World Series competition by having them take a year off to play against a bunch of old crocks in a Parks &.
He had told the truth about Immokalee, explaining that the town was in a rural area, with the same climate as the Philippines and that there were cities nearby--Naples and Fort Myers--where they could go and shop on weekends and see first-run movies and major-league baseball games during spring training.