birthday
3 ENTRIES FOUND:
plural
birthdays
plural
birthdays
Britannica Dictionary definition of BIRTHDAY
[count]
1
:
the day when someone was born or the anniversary of that day
— often used before another noun
-
Her birthday is September 30th.
-
Today is his 21st birthday.
-
Happy Birthday!
-
a birthday party/gift
2
:
the day when something began
-
The company just celebrated its 50th birthday.
birthday suit
informal + humorous
◊ If you are wearing your birthday suit, you are naked.
-
We were standing there in nothing but our birthday suits.
