Main Entry: blue·grass

Pronunciation: \-ˌgras\

Function: noun

Date: 1751

1 : any of several grasses (genus Poa) of which some have bluish-green culms; especially : kentucky bluegrass
2 [from the Blue Grass Boys, performing group, from Bluegrass state, nickname of Kentucky] : country music played on unamplified stringed instruments (as banjo, fiddle, guitar, and mandolin) and characterized by free improvisation and close usually high-pitched harmony