birthdayKK [ˋbɝˏθde] /ˈbɝˌθdeɪ/名詞1生日、壽辰She invited twenty friends to her thirtieth birthday party.她邀請了二十位朋友參加她的三十歲生日派對。2出生日期Please write your birthday and address on the form.請在表格上填寫你的出生日期和地址。3誕辰、成立紀念日The museum is celebrating its hundredth birthday this fall.這座博物館今年秋天要慶祝成立一百週年。