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.
She first picked up a brush as a married mother of three in her thirties, and only after her father’s death.
From Los Angeles Times ● Sep. 21, 2026
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
She had started turning gray in her thirties, so I knew that was likely to happen to me too.
From "October Sky" by Homer Hickam
