plural birthdays
plural birthdays
Learner's definition of BIRTHDAY
[count]
1
: the day when someone was born or the anniversary of that day出生日期;生日 —
often used before another noun常用于另一名词前 2
: the day when something began开始的日子;诞生的日子
birthday suit
informal + humorous
◊ If you are wearing your birthday suit, you are naked.赤身裸体;一丝不挂