twenty-first

Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌtwenty-ˈfirst noun [countable usually singular] HMNyour twenty-first birthday or the celebration you have for it 二十一岁生日；二十一岁生日庆祝会

ˌtwenty-ˈfirst nounChineseSyllable

twenty-first
ˌtwenty-ˈfirst

noun [countable usually singular]
your twenty-first birthday or the celebration you have for it

twenty-first

BrE

/ˌtwenti ˈfɜːst/

🔊

NAmE

/ˌtwenti ˈfɜːrst/

🔊

noun

[singular]

(

informal,

especially BrE

)

a person's 21st birthday and the celebrations for this occasion * 21 岁生日；21 岁生日庆典