means A style of festive, expressive Jewish folk music—traditionally played by ensembles featuring clarinet, violin, and accordion—rooted in the Ashkenazi communities of Eastern Europe.

from From Yiddish klezmer, itself a squeezing-together of two Hebrew words: kli (vessel or instrument) and zemer (song or melody)—literally a 'vessel of song.' At first it named the musician rather than the music: a klezmer was the player you hired for a wedding. Only later, especially in 20th-century America, did the word slide over to mean the music itself. The plural, fittingly tangled, is klezmorim.