Yiddish

Short definition from Wiktionary

Adjective

1. 1
   Of or pertaining to the Yiddish language.
2. 2
   Jewish; relating to Yiddishkeit.

Proper noun

1. 1
   A West Germanic, or more specifically High German, language that developed from Middle High German dialects, with an admixture of vocabulary from multiple source languages including Hebrew-Aramaic, Romance, Slavic, English, etc., and mostly written in Hebrew characters which is used mainly among Ashkenazic Jews from central and eastern Europe.