thirty

noun

thir·ty | \ ˈthər-tē

plural thirties

Definition of thirty

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

Other Words from thirty Example Sentences Learn More about thirty

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Other Words from thirty

thirtieth \ ˈthər-tē-əth

\ adjective or noun

thirty adjective

thirty pronoun, plural in construction

thirtyish \ ˈthər-tē-ish

\ adjective

Examples of thirty in a Sentence

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

Recent Examples on the Web

Forget about peaks—lovemaking can be exciting in your twenties, thirties, forties and beyond. — Sharon Boone, Essence, "Do Tell! Five Sexy Confessions From Women In Their 20s, 30s and 40s," 30 July 2019 Minors are only part of a wider exodus that involves mostly Eritreans in their twenties and thirties. — Milena Belloni, Quartz Africa, "Why young Eritreans are going to keep risking deadly migration crossings to Europe," 27 July 2019 Now in her thirties, Jaime and her husband have two children. — Kathryn Jean Lopez, National Review, "The Need for Foster Care Is Great, So Let Faith-Based Agencies Provide It," 29 July 2019 Decades of alcohol abuse, beginning in his thirties, had left him incapacitated and unable to take care of himself. — Vikram Zutshi, Quartz India, "Why do abusive men (and the women who support them) behave the way they do?," 19 July 2019 Roger Federer, Rafael Nadal and Novak Djokovic, all comfortably into their thirties, remain the foremost players on the men’s tennis tour. — oregonlive.com, "Roger Federer, Rafael Nadal still dominate, evidence this isn’t tennis’ greatest era: 2019 Wimbledon," 8 July 2019 Painted when the artist was in his thirties, the monumental works prefaced Tiepolo’s later Grand Mannerist creations in such far-flung locales as Bavaria and Spain. — Meilan Solly, Smithsonian, "The Frick Revives 18th-Century Frescoes Destroyed During World War II," 3 July 2019 Frannie is in her thirties, broke and disheartened by her lack of progress on all fronts. — Renee Valois, Twin Cities, "Park Square’s ‘Jefferson Township Sparkling Junior Talent Pageant’ is over-the-top absurd — and hilarious," 29 June 2019 There’s a difference between seeing that as a child and not seeing it until your thirties. — Megan Angelo, Glamour, "Booksmart Is the First Truly Evolved High School Movie," 24 May 2019

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.

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More Definitions for thirty

thirty

noun

English Language Learners Definition of thirty

: the number 30

: the numbers ranging from 30 to 39

: a set of years ending in digits ranging from 30 to 39

See the full definition for thirty in the English Language Learners Dictionary

thirty

adjective

thir·ty | \ ˈthər-tē

Kids Definition of thirty

(Entry 1 of 2)

: being three times ten

thirty

noun

Kids Definition of thirty (Entry 2 of 2)

: three times ten : 30

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thirty

Definition of thirty

Other Words from thirty

Examples of thirty in a Sentence

First Known Use of thirty

History and Etymology for thirty

English Language Learners Definition of thirty

Kids Definition of thirty

thirty

Definition of thirty

Other Words from thirty

Examples of thirty in a Sentence

First Known Use of thirty

History and Etymology for thirty

English Language Learners Definition of thirty

Kids Definition of thirty

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