Argentina UK [ˌɑːd͡ʒənˈtiːnə]US /ɑːɹdʒənˈtiːnə/ noun1 •A country in South America. Official name: Argentine Republic. Capital: Buenos Aires.To dollarize its economy, Argentina would need to exchange all pesos held by its people and businesses for US dollars, and assign a dollar value to all of its assets and contracts. — 2023