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
Last year, Jasmine Paolini made two Grand Slam finals for the first time, at the age of twenty-nine, and one of the game’s top Americans, Jessica Pegula, found her most consistent success in her late twenties and early thirties.
—
Louisa Thomas, The New Yorker, 9 Mar. 2025
Most of the new members were in their twenties and thirties, and many felt disillusioned with American society.
—David Peisner, Rolling Stone, 23 Feb. 2025
More people describing themselves as bisexual, particularly those in their late teens, twenties and thirties, is largely what drove this year’s increase in LGBTQ+ identification, according to Gallup.
—Brendan Rascius, Miami Herald, 20 Feb. 2025
Harbin earned a doctoral degree in art history from Rutgers University in 2017 and spent much of her twenties and thirties working in higher education, intending to become a professor.
—Morgan Smith, CNBC, 11 Feb. 2025
See All Example Sentences for thirty
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Louisa Thomas, The New Yorker, 9 Mar. 2025
Most of the new members were in their twenties and thirties, and many felt disillusioned with American society.
—David Peisner, Rolling Stone, 23 Feb. 2025
More people describing themselves as bisexual, particularly those in their late teens, twenties and thirties, is largely what drove this year’s increase in LGBTQ+ identification, according to Gallup.
—Brendan Rascius, Miami Herald, 20 Feb. 2025
Harbin earned a doctoral degree in art history from Rutgers University in 2017 and spent much of her twenties and thirties working in higher education, intending to become a professor.
—Morgan Smith, CNBC, 11 Feb. 2025
See All Example Sentences for thirty
Cite this Entry
“Thirty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thirty. Accessed 22 Mar. 2025.
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