birthday
noun
birth·day ˈbərth-ˌdā 
1
a
: the day of a person's birth
b
: a day of origin
2
: an anniversary of a birth
her 21st birthday
Examples of birthday in a Sentence
Her birthday is September 30th. Today is his 21st birthday. The company just celebrated its 50th birthday.
Recent Examples on the Web
For his 28th birthday, Biles wrote her beau a sweet message on Instagram. —
Diane J. Cho, PEOPLE, 22 Apr. 2026 Package up small boxes of these truffles to hand out to friends and family for birthdays and holidays. —Jessica Saari Christensen, Better Homes & Gardens, 22 Apr. 2026 Reportedly, Prince Harry sent flowers to the Queen’s grave at the King George VI Memorial Chapel at Windsor Castle to commemorate her birthday. —Lizzie Lanuza, StyleCaster, 22 Apr. 2026 On the occasion of Earth Day and Jane Goodall’s birthday, Vital Impacts has created a collection of images for purchase, with proceeds going to initiatives that support youth environmental education. —Photovogue, Vogue, 22 Apr. 2026 See All Example Sentences for birthday
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Diane J. Cho, PEOPLE, 22 Apr. 2026 Package up small boxes of these truffles to hand out to friends and family for birthdays and holidays. —Jessica Saari Christensen, Better Homes & Gardens, 22 Apr. 2026 Reportedly, Prince Harry sent flowers to the Queen’s grave at the King George VI Memorial Chapel at Windsor Castle to commemorate her birthday. —Lizzie Lanuza, StyleCaster, 22 Apr. 2026 On the occasion of Earth Day and Jane Goodall’s birthday, Vital Impacts has created a collection of images for purchase, with proceeds going to initiatives that support youth environmental education. —Photovogue, Vogue, 22 Apr. 2026 See All Example Sentences for birthday
Cite this Entry
“Birthday.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.grautoblog.com/dictionary/birthday. Accessed 27 Apr. 2026.
Copy CitationKids Definition
birthday
noun
birth·day ˈbərth-ˌdā
1
: the day or anniversary of one's birth
2
: the day or anniversary of a beginning
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