English Reference
noun

bluegrass

n.
US /ˈbɫuˌɡɹæs/ UK /blˈuːɡɹɑːs/ blue·grass

  1. 01 B2 Upper Intermediate Music

    a style of American country music played on acoustic instruments like the banjo, fiddle, and mandolin.

    a subgenre of American roots music characterized by acoustic stringed instruments, high-pitched vocals, and fast-paced improvisation.

    Simple

    We spent the whole weekend at a bluegrass festival listening to amazing banjo players.

    In context

    The band blended traditional bluegrass with modern jazz elements, creating a sound that appealed to both purists and younger audiences.

    Usage

    Usually uncountable when referring to the genre.

    folk musicroots music
  2. 02 C1 Advanced Technical

    a common type of grass with bluish-green stems, often grown in parks and gardens in North America.

    a species of grass, Poa pratensis, valued for its durability in lawns and pastures, particularly in the eastern United States.

    Simple

    Kentucky is famous for its beautiful fields of bluegrass.

    In context

    The landscaper recommended a hardy variety of bluegrass for the new park because it withstands heavy foot traffic well.

    Usage

    Can be countable when referring to specific botanical varieties.

    meadow grass

The first bluegrass album in more than 22 years to debut at the top of the US album sales chart, it confirmed him as the genre’s biggest crossover star in decades.

The Guardian· 27 Aug 2026

Etymology 1

From blue + grass, from the bluish appearance of the massed grass in late Spring.

Etymology 2

From the band Blue Grass Boys, led by Bill Monroe; bluegrass is first attested in print in reference to the genre of music in 1956.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Occasional
Updated