say it: BLOO-gras
bluegrass is a noun meaning "any of various grasses of the genus Poa". It carries 3 recorded senses.
any of various grasses of the genus Poa
an area in central Kentucky noted for its bluegrass and thoroughbred horses
a type of country music played at a rapid tempo on banjos and guitars
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for bluegrass come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.