Longman Dictionary of Contemporary English
The Collaborative International Dictionary
minor-league \minor-league\ a. Of or pertaining to a minor league.
2. Of mediocre talent or poor accomplishment; unimportant; -- of people; as, a minor-league physicist.
Wiktionary
a. 1 (context US English) Of or pertaining to a minor league 2 Of relatively minor importance
Usage examples of "minor-league".
It was just a ballyard, like hundreds of other minor-league parks he’d been through: covered grandstand, bleachers out in back of left and right, advertisements pasted on the boards of the outfield fences—faded, peeling, tattered advertisements now, because nobody in Hot Springs was advertising much of anything these days.
That was even worse than the greasy spoons he'd haunted as he bounced from one minor-league town to the next.
They went there often, and Elizabeth went without the feeling that she was walking into some minor-league Don Juan's passion pit.
He didn't even get into the lineup until after the Sox broke camp, and then he went in only as a pinch hitter against minor-league opposition.