an anniversary of the day on which a person was born (or the celebration of it)
the date on which a person was born
同义词：natal day
birthday例句
I received a set of gardening tools on my birthday.
生日那天，我收到一套园艺工具。
He gave her an expensive fur for her birthday.
他送给她一件昂贵的毛皮衣服作生 日礼物。
I'm getting a new computer for birthday present.
我得到一台电脑作生日礼物。
I was eighteen on my last birthday.
我已经过了18周岁了。
Tom's birthday is this week.
汤姆的生日就在这个星期。
Next Tuesday is his birthday.
下周二是他的生日。
Next Monday will be my 21st birthday.
下星期一是我二十一岁的生日。
Happy birthday to you!
祝你生日快乐！
birthday详细解释
birth.day n.（名词）The day of one`s birth.生日：某人出生日期The anniversary of one`s birth.生日：某人出生日期的周年纪念日n.attributive.（定语名词）Often used to modify another noun:常用于修饰名词：例句：a birthday cake; birthday parties.生日蛋糕；生日聚会
