Minhag (Hebrew: מנהג "custom", pl. minhagim) is an accepted tradition or group of traditions in Judaism. A related concept, Nusach, (נוסח, nuschaot) refers to the traditional order and form of the prayers.
Orthodox Jews consider Halakha, Jewish law as derived from the Talmud, binding upon all Jews. However, in addition to these halakhot, there have always been local customs and prohibitions. Some customs were eventually adopted universally (e.g. wearing a head covering) or almost universally (e.g. monogamy). Others are observed by some major segments of Jewry but not by others (e.g., not eating rice on Passover). These Minhagim exist in various forms.