qualifier

noun
1
a person or team that has defeated others in order to enter a particular competition
راه‌یافته, صعودکننده
2
a game or match that a person or team has to win in order to enter a particular competition
بازی مقدماتی, مسابقه مقدماتی, بازی انتخابی
a World Cup qualifier
3
a word, especially an adjective or adverb, that describes another word in a particular way
توصیف‌کننده, قید, صفت, توضیح‌دهنده, محدودکننده
In ‘the open door’, ‘open’ is a qualifier, describing the door.