the annual anniversary of the day on which a person was born, typically treated as an occasion for celebration and present-giving 生日,诞辰 his twenty-ninth birthday. 他的29周岁生日。 I'm going to get a doll's house for my birthday. 我要给自己生日买个玩偶屋。 [as modifier]a birthday cake. 生日蛋糕。 ■the day of one's birth 出生日期 he shares a birthday with Rod Stewart. 他和罗德•斯图尔特出生日期一样。 ■the anniversary of something starting or being founded 诞生日,创始日 staff celebrated the twenty-fifth birthday of the paper. 员工庆祝该报创刊25周年。