Yiddish, n. [G. jÜdisch, prop., Jewish, fr. Jude Jew. See Jew, Jewish.].
A language used by German and other Jews, being a Middle German dialect developed under Hebrew and Slavic influence. It is written in Hebrew characters. [Webster 1913 Suppl.]
Yiddish, n. & adj.
--n. a vernacular used by Jews in or from central and eastern Europe, orig. a German dialect with words from Hebrew and several modern languages.
--adj. of or relating to this language.