thirty
noun
a cardinal number, 10 times 3.
thirties
-
pluralof thirty.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The man is thought to have been in his thirties or forties, officials added.
From BBC ● Jul. 30, 2026
Confirmed traffic through the strait fell to just 10 ships Monday, according to ship-tracking firm Kpler, compared with levels in the thirties and forties early last week.
From The Wall Street Journal ● Jul. 14, 2026
During his two days of detention on the boat, Bertel, who is in his thirties, also spoke of "three soldiers in a container".
From Barron's ● May 22, 2026
But researchers are seeing a troubling shift in younger people, with more cases now appearing in adults under 50, including some in their thirties.
From Science Daily ● May 15, 2026
Lawrence “became a relatively prominent guy during the thirties, and rightly so,” Oppenheimer would recall.
From "Big Science" by Michael Hiltzik
