thirty

noun thir·ty \ ˈthər-tē \

|Updated on: 18 Jul 2018

Examples: thirty in a Sentence

Definition of thirty

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

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thirtieth

play \ˈthər-tē-əth\ adjective or noun

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thirty

adjective

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thirty

pronoun, plural in construction

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thirtyish

play \ˈthər-tē-ish\ adjective

See thirty defined for English-language learners

See thirty defined for kids

Examples of thirty in a Sentence

The temperature outside is in the high thirties.
He is in his thirties.

Recent Examples of thirty from the Web

Both in their thirties, the superstars are unlikely to return in Qatar in 2022.

— john leicester, chicagotribune.com, "Winds of football change blow at Russia World Cup," 7 July 2018
The man, who is believed to be in his thirties, was shot in the area of Brookford and Dacia streets in Dorchester around 9:50 p.m., Boston police wrote on their website.

— felicia gans, BostonGlobe.com, "One man dead, four others injured in two separate July 4 shootings in Dorchester," 5 July 2018
The two-minute-thirty-second clip went live December 31, 2015.

— heran mamo, Billboard, "XXXTentacion Discusses His History of Violence & Why He's Against Feminism in New Interview," 5 June 2018
His approval rating in most polls has moved up from the high thirties to the low forties.

— ronald brownstein, CNN, "Beating Republicans in November will be harder than Democrats thought," 22 May 2018
The thirties also brought revelations and violent political emergencies that plunged Locke into a rapprochement with the left.

— tobi haslett, The New Yorker, "The Man Who Led the Harlem Renaissance—and His Hidden Hungers," 11 May 2018
Next to him is a scruffy man in his thirties who has the chemical structure of dopamine tattooed on his left arm.

— bruce schoenfeld, WIRED, "Your Next Glass of Wine Might Be a Fake—and You'll Love It," 30 May 2018
Future races may include a few flat-course events that would give her a shot at notching a PR in her mid-thirties, but Linden will always prioritize competing in marquee events like the New York or Boston Marathon over chasing a fast time.

— martin fritz huber, Outside Online, "Des Linden Will Never Be the Same," 10 May 2018
Now that three-quarters of them are in their thirties, there are distractions at home: wives, kids, rent.

— eve barlow, GQ, "Parquet Courts Are Here to Thrash," 7 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thirty.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of thirty

Middle English thritty, from thritty, adjective, from Old English thrītig, from thrītig group of 30, from thrīe three + -tig group of ten; akin to Old English tīen ten

NEW! Time Traveler

First Known Use: before 12th century

in the meaning defined at sense 1

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