1. Bluegrass Region - Noun
2. Bluegrass Region - Proper noun
an area in central Kentucky noted for its bluegrass and thoroughbred horses
Source: WordNetIt was the site of the first commercial winery in the United States (started in present-day Jessamine County in 1799) and due to the high calcium content of the soil in the Bluegrass region quickly became a major horse breeding (and later racing) area. Source: Internet
Horse racing had a strong tradition in Kentucky, whose Inner Bluegrass Region had been a center of breeding high-quality livestock throughout the 19th century. Source: Internet