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
The twitch reflexes needed to compete at the highest levels of video game competition start to falter once people hit their thirties.
—
Issy Van Der Velde, Rolling Stone, 4 Feb. 2025
These 34 goals came in just 32 games and Ronaldo was in his thirties for 26 of the matches.
—Will Jeanes, The Athletic, 4 Feb. 2025
Laura Modi finds comfort in chaos. Modi, 39, spent her early thirties building her first company, working 12-hour days and raising three young kids.
—Morgan Smith, CNBC, 31 Jan. 2025
To find herself again, Hollis hosts a weekend away at her house on Nantucket with three friends from different stages in her life: her childhood, her twenties, thirties, and one surprise fifth star.
—Etan Vlessing, The Hollywood Reporter, 27 Jan. 2025
See all Example Sentences for thirty 
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Issy Van Der Velde, Rolling Stone, 4 Feb. 2025
These 34 goals came in just 32 games and Ronaldo was in his thirties for 26 of the matches.
—Will Jeanes, The Athletic, 4 Feb. 2025
Laura Modi finds comfort in chaos. Modi, 39, spent her early thirties building her first company, working 12-hour days and raising three young kids.
—Morgan Smith, CNBC, 31 Jan. 2025
To find herself again, Hollis hosts a weekend away at her house on Nantucket with three friends from different stages in her life: her childhood, her twenties, thirties, and one surprise fifth star.
—Etan Vlessing, The Hollywood Reporter, 27 Jan. 2025
See all Example Sentences for thirty
Dictionary Entries Near thirty
Cite this Entry
“Thirty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thirty. Accessed 10 Feb. 2025.
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