1. yerba buena - Noun
2. Yerba buena - Proper noun
yerba buena (uncountable)
A perennial herb native to North America, Satureja douglasii, having white or purple flowers and a mint-like fragrance.
(historical) A Spanish settlement founded on the 29th of June, 1776 near the northeastern end of the San Francisco Peninsula, California; captured by United States forces during the Mexican–American War, it was renamed San Francisco on the 30th of January, 1847.
A city and department of Tucumán, in northern Argentina.
Source: en.wiktionary.org