big league

noun
1
a group of teams in a professional sport, especially baseball, that play at the highest level
لیگ برتر, لیگ سطح بالا, لیگ حرفه‌ای
2
a very successful and important group
گروه مهم, دسته برتر, گروه برجسته, دسته برجسته
Over the past year, the company has joined the big league.