Major-league definition
Major-league baseball.
A major-league ballet company.
You can't be so casual. You're in the major leagues now.
That rock band is really major league.
Calatrava is a major league architect.
The company made a major league effort to get the contract.
Bill accidentally faxed sensitive documents to our competitors, and such a major-league mess-up could only be dealt with by firing Bill.
- the two main leagues of professional baseball clubs in the U.S., the National League and the American League