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Buenos Aires

American  
[bway-nuhs ahyuhr-iz, boh-nuhs, bwe-naws ahy-res] / ˈbweɪ nəs ˈaɪər ɪz, ˈboʊ nəs, ˈbwɛ nɔs ˈaɪ rɛs /

noun

  1. a seaport in and the capital of Argentina, in the eastern part, on the Río de la Plata.


Buenos Aires British  
/ ˈbwenos ˈaires, ˈbweɪnɒs ˈaɪrɪz /

noun

  1. the capital of Argentina, a major port and industrial city on the Río de la Plata estuary: became capital in 1880; university (1821). Pop: 13 349 000 (2005 est)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Buenos Aires Cultural  
  1. Capital of Argentina and largest city in the country, located in eastern Argentina near Uruguay.


Discover More

One of the largest cities in Latin America, Buenos Aires is Argentina's chief port and financial, industrial, commercial, and social center.

La Prensa and La Nación are two of its daily newspapers, popular throughout the Spanish-speaking world.

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.

See Examples For:

He will visit Montevideo, Paysandu and Florida in Uruguay from November 6 to 8 and then head to Argentina, where he will visit Buenos Aires, Cordoba and Lujan, until November 11.

From Barron's ● Sep. 26, 2026

Times staff writer Ana Ceballos in Washington and special correspondents Andrés D’Alessandro in Buenos Aires and Cecilia Sánchez Vidal in Mexico City contributed to this report.

From Los Angeles Times ● Sep. 13, 2026

Unable to reach him by phone, colleagues in Atlanta asked the company’s Buenos Aires office to find someone to drive five hours to the ranch and deliver the latest data on falling sales.

From The Wall Street Journal ● Sep. 8, 2026

The paper says Burnham "failed to respond" after Buenos Aires "escalated tensions to their highest level since 1982".

From BBC ● Sep. 5, 2026

The problem was the train in Buenos Aires.

From "Scythe" by Neal Shusterman

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