| 1. | any grass of the genus Poa, as the Kentucky bluegrass, P. pratensis, having dense tufts of bluish-green blades and creeping rhizomes. |
| 2. | country music that is polyphonic in character and is played on unamplified stringed instruments, with emphasis esp. on the solo banjo. |
| 3. | the Bluegrass. Bluegrass Region. |
A kind of folk music for guitar, banjo, violin, other stringed instruments, and voice; bluegrass is distinguished by rapid notes and improvisation by the musicians.