a language derived from Middle High German, spoken by East European Jews and their descendants in other countries: it is written in the Hebrew alphabet and contains vocabulary borrowings from Hebrew, Russian, Polish, English, etc.: abbrev. or
adjective
of or in this language
See Yiddish in American Heritage Dictionary 4
(yĭdˈĭsh)
noun
The language historically of Ashkenazic Jews of Central and Eastern Europe, resulting from a fusion of elements derived principally from medieval German dialects and secondarily from Hebrew and Aramaic, various Slavic languages, and Old French and Old Italian.