Roughly translated, "Jewish-hood," i.e., everything that goes into being Jewish, from music to food to berakhot.

(lit., "Jewishness"; Yid.): the Torah way of life

a sense of things Jewish. After yiou read this book you will have a real sense of Yiddishkeit. p. 11

lit., `Jewishness'; ( Yiddish): Judaism; The Torah way of life.

Yiddishkeit (Yidishkayt in standard transcription) literally means Judaism or "Jewishness" in the Yiddish language. It has come to mean the "Jewishness" or "Jewish essence" of Ashkenazi Jews in general and the traditional Yiddish-speaking Jews of Eastern and Central Europe in particular. In particular, it is associated with the popular culture or folk practices of Yiddish-speaking Jews, such as popular religious traditions, Eastern European Jewish food, Yiddish humour, shtetl life, and klezmer music, among other things.