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
Is there any part of you that wishes that this had all happened in your twenties or thirties, instead of in your forties and fifties?
—
Michael Schulman, The New Yorker, 12 Jan. 2025
Those impossible beauty standards, the constant self-doubt, unhealthy coping mechanisms, and materialistic desires are some of the other examples of what people say goodbye to in their thirties.
—Yaakov Katz, Newsweek, 12 Jan. 2025
Both ended up walking, in their thirties, for free, their best days behind them.
—James Horncastle, The Athletic, 10 Jan. 2025
Now in my late thirties, I’m also being forced to reassess my relationship with my own body.
—Latria Graham, AFAR Media, 2 Jan. 2025
See all Example Sentences for thirty 
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.
Michael Schulman, The New Yorker, 12 Jan. 2025
Those impossible beauty standards, the constant self-doubt, unhealthy coping mechanisms, and materialistic desires are some of the other examples of what people say goodbye to in their thirties.
—Yaakov Katz, Newsweek, 12 Jan. 2025
Both ended up walking, in their thirties, for free, their best days behind them.
—James Horncastle, The Athletic, 10 Jan. 2025
Now in my late thirties, I’m also being forced to reassess my relationship with my own body.
—Latria Graham, AFAR Media, 2 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 19 Jan. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share