twenty-first
🇺🇸
/ˌtwenti ˈfɜːrst/
🇬🇧
/ˌtwenti ˈfɜːst/
The celebration or event that marks someone's 21st birthday.
On her twenty-first, she received a trip to Paris as a gift.
그녀의 스무 한 살 생일에, 그녀는 파리 여행을 선물로 받았습니다.