Bluegrass (noun)

1. A type of music characterized by fast-paced instrumental solos on the banjo, fiddle, guitar, and mandolin, and featuring tight harmonies and emotional, often melancholy lyrics.
2. A type of grass, typically with blue-green leaves, that is commonly found in the Southern United States.

Origin:

The term is believed to have originated in the 1940s in reference to the blue-green color of the leaves of poa pratensis, a type of grass commonly found in the southern united states.

Examples:

1. He grew up listening to bluegrass music and was a talented musician himself.
2. The bluegrass festival attracted musicians and fans from all over the country.
3. The band's sound was a unique blend of bluegrass and rock.
4. The bluegrass in the pasture was knee-high and swayed in the breeze.
5. The park was filled with the sweet sound of bluegrass music on a sunny afternoon.