<p><strong>Noun</strong></p><ul><li>Any grass of the genus <em>Poa</em>, as the Kentucky bluegrass (<em>P. pratensis</em>), having dense tufts of bluish-green blades and creeping rhizomes.</li><li>Country music that is polyphonic in character and is played on unamplified stringed instruments, with emphasis especially on the solo banjo.</li><li>The Bluegrass.</li><li>Bluegrass Region.</li></ul>