Nachmanides states[9] 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".
[15] There is a difference between issuing a ruling, meaning to "distinguish the case at hand from the precident [sic]... to solve a problem,"[13]: footnotes 4 & 5 and an understanding of something.
Among the first post-Geonic writers of ḥiddushim[10]: pp.465–466 are: By the late sixteenth century, with printing an established technology, hair-splitting distinctions into the treatment of halakic-Talmudic themes became more frequent,[27] with ḥiddush-driven works such as those by: A counter-intuitive use of the term was the Chasam Sofer's novel interpretation of the phrase Chadash asur min haTorah, ("'new' is forbidden by the Torah").
The phrase as originally used is regarding the laws of keeping kosher, whereas his use was regarding changes being made by the Reform movement in Europe: it was a way of saying no—but using a pun.
[29] In its regular, contemporary, use, ḥiddush means a novel or innovative (or unusual) idea or point;[30][8] examples: and similarly, book titles may be of the following form: Ḥiddush has to some extent become assimilated into American English;[33] and the word—particularly in "Yinglish"—is also commonly used in an ironic or humorous fashion, so as to imply that the statement in question is "nothing new".