birthday

American  

[burth-dey] / ˈbɜrθˌdeɪ /

noun

1. the anniversary of a birth.

2. the day of a person's birth.

3. a day marking or commemorating the origin, founding, or beginning of something.

4. the festivities or celebration marking such a day or anniversary.

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birthday British  

/ ˈbɜːθˌdeɪ /

noun

1. 1. an anniversary of the day of one's birth

   2. ( as modifier )

      birthday present

2. the day on which a person was born

3. any anniversary

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Etymology

Origin of birthday

Middle English word dating back to 1350–1400; birth, day

Example Sentences

The photos appear to be from the same shoot used to capture photos for George's 12th and Louis' seventh birthdays.

From BBC

The men have been providing documents to the House Oversight Committee in response to a subpoena, including Epstein’s birthday book and a cache of emails.

From The Wall Street Journal

Just a few weeks ago, the family celebrated Al’s 77th birthday in the garden along with their extended family.

From Los Angeles Times

A month before the fire struck, he and his wife held a “Winter Wonderland”-themed birthday party for their 1-year-old.

From Los Angeles Times

She figured she, too, would spend her whole life in this neighborhood, where she — an Independence Day baby — got to spend each birthday marching in the huge Fourth of July Parade.

From Los Angeles Times