Chidush

Chidush (Hebrew: חִדּוּשׁ‎; also transliterated as chiddush, hiddush or hidush), sometimes used in its plural form, chidushim (Hebrew: חִדּוּשׁים‎), is a novel interpretation or approach to something. It is widely used in rabbinic literature to describe a form of innovation that is made inside the system of the halakha, as distinguished from shinuy, an innovation outside tradition.

Chidush comes from the Hebrew root word chadash (Hebrew: חדש‎), meaning new. The usage of the word in this context originated from the language of Talmudic analysis and argumentation in the Gemara. It passed into Yiddish, where it is at times used informally.

Nachmanides states that it is an "obligation imposed upon us to search through the subjects of the Torah and the precepts and bring to light their hidden contents."

New ways to recall what we learn can be a form of chidush.

Although "any chiddush (novel idea) which a reputable disciple will ever come up with was already given to Moses by Sinai," in one rabbi's understanding of a particular ruling, he wrote: "I have always understood Rabbi Feinstein to be insisting on a balance between innovation and tradition.

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