major league
US /ˌmeɪdʒər ˈliːɡ/
UK /ˌmeɪdʒər ˈliːɡ/

1.
Ligue Majeure, ligue majeure
the highest level of professional baseball in the United States and Canada, consisting of the National League and the American League
:
•
He dreams of playing in the Major League someday.
Il rêve de jouer un jour dans la Ligue Majeure.
•
The team signed a new pitcher from the Major League.
L'équipe a signé un nouveau lanceur de la Ligue Majeure.
1.
de grande envergure, de premier ordre
of or relating to the highest level of a sport or activity
:
•
This project is a major league undertaking.
Ce projet est une entreprise de grande envergure.
•
She's a major league talent in her field.
C'est un talent de premier ordre dans son domaine.