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- thirtyˈthər-tēnounplural thirties
- a number equal to three times 10
- the numbers 30 to 39the years 30 to 39 in a lifetime or century
- a sign of completion : endwrote thirty on the last page of the story
- the second point scored by a side in a game of tennis
WEB3 days ago · Learn the meaning, pronunciation and origin of the number 30 in English. Find out how to use thirty in sentences, idioms and expressions, and compare it with other languages.