from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various grasses of the genus Poa, including many valuable lawn and pasture plants, such as Kentucky bluegrass, and also some weeds.
- n. Music A type of folk music that originated in the southern United States, typically played on banjos and guitars and characterized by rapid tempos and jazzlike improvisation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Kentucky bluegrass, Poa pretensis.
- n. A style of country music with roots in Scots-Irish Appalachian folk music, blues, and jazz. Characterized by banjos, fiddles, and mandolins, but containing no drums.
From blue + grass (Wiktionary)