plural thirties
1
: a number equal to three times 10 see Table of Numbers
2
thirties plural
: the numbers 30 to 39
specifically
: the years 30 to 39 in a lifetime or century
3
: a sign of completion : end
—usually written 30
wrote thirty on the last page of the story
4
: the second point scored by a side in a game of tennis
thirty
adjective
thirty
pronoun, plural in construction
Examples of thirty in a Sentence
The temperature outside is in the high thirties.
He is in his thirties.
Recent Examples on the Web
According to their data, millennials—who are mostly in their thirties and settling down—live the farthest away from their employer.
—
Beth Greenfield, Fortune Europe, 1 July 2024
June 18, 2024 The hiking group was as varied as a bag of trail mix, ranging from an elderly man in his seventies to a woman in her early thirties.
—Mary Holland, Condé Nast Traveler, 18 June 2024
At the press conference, Harding said the victims' ages range from 19 to 43, but most of them are in their thirties.
—Stephanie Warsmith, USA TODAY, 3 June 2024
Learn How to Relax The temperature of open water varies greatly, depending on the time of year, geographic location, and size of the body of water, and ranging from the low thirties to the nineties (and above).
—Jenny McCoy, Outside Online, 16 June 2019
See all Example Sentences for thirty 
Beth Greenfield, Fortune Europe, 1 July 2024
June 18, 2024 The hiking group was as varied as a bag of trail mix, ranging from an elderly man in his seventies to a woman in her early thirties.
—Mary Holland, Condé Nast Traveler, 18 June 2024
At the press conference, Harding said the victims' ages range from 19 to 43, but most of them are in their thirties.
—Stephanie Warsmith, USA TODAY, 3 June 2024
Learn How to Relax The temperature of open water varies greatly, depending on the time of year, geographic location, and size of the body of water, and ranging from the low thirties to the nineties (and above).
—Jenny McCoy, Outside Online, 16 June 2019
See all Example Sentences for thirty
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'thirty.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near thirty
Cite this Entry
“Thirty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thirty. Accessed 15 Jul. 2024.
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