Ma'anar ƙamus na "ƙasar bluegrass" tana nufin yanki ko yanki da aka sani da kiɗan bluegrass, wanda shine nau'in kiɗan da ya samo asali a yankin Appalachian na Amurka. Kalmar "bluegrass" ta samo asali ne daga tsire-tsire na bluegrass da ya zama ruwan dare a yankin kuma mawaƙa suna amfani da su don yin kayan aikin su, irin su shahararren bluegrass mandolin. Ƙasar Bluegrass yawanci tana da alaƙa da kudu maso gabashin Amurka, musamman Kentucky, inda Cibiyar Kiɗa na Bluegrass ta Duniya take, da kuma inda ake gudanar da bikin kiɗa na bluegrass na Kentucky na shekara-shekara.