TWENTY-FIRSTER
Meaning of TWENTY-FIRSTER in English
ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ə(r) noun
( -s )
Etymology: twenty-first + -er
: the celebration of a 21st birthday
Webster's New International English Dictionary.
Новый международный словарь английского языка Webster.
2012