# Buenos Aires

> English word · Proper noun · IPA /ˈbweɪ.nəs ˈɛə.ɹiːz/

## Definitions
1. The capital city of Argentina.
2. The largest and most populous province in Argentina, part of the Pampas region. Capital city: La Plata.

## Etymology
Borrowed from Spanish Buenos Aires, named after an epithet of the Virgin Mary, itself ultimately derived from Aragonese buen ayre (literally “good air”) or derived from Sardinian bonaria. The first English attestation dates to 1764.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/buenos-aires