barbershop quartet Definition

cappella, choral, choir, chorale, chorus, string quartet, ensemble, symphony orchestra, quintet, tuba, cantus, euphonium, organist, capella, choralist, contradance, madrigal, quartets, string orchestra, penillion, ripienist, musical organization, jug band, soloist, bluegrass, serenaders, harmonizers, contra dance, bass fiddle, dixieland, bagpiper, in chorus, sea chantey, singing, band, althorn, semichorus, pennywhistle, chantey, madrigalist, medly, squeezebox, handbell, polka, corno di bassetto, caroling, rhythm section, revue, mummer, sextet, fiddlers, ukes, harmonies, baritone, orchestra, musical, squeeze box, ragtime, instrumentalists, sopranist, barbershop, improv, brass section, yardbird, symphonize, quartette, novillero, concertino, tenor, chorister, harpist, ghosty, opry, valve trombone, samisen, oboists, harmonica, hootenanny, cabaret, percy grainger, vocalists, orchestral, jazz band, banjoist, shivaree, dulcimer, chamber orchestra, baton twirler, postlude, quartet, coquettes, ukulele, wind instrument, fluegelhorn, musicale, calliope, mandolin, carolers, tenoroon, grandfather clock,