How do you spell Hannukah?
an accepted or binding tradition or set of traditions in a Jewish community; also, the form of liturgy used by a particular Jewish community
Minhag is an important ingredient of halakhah.
1843; Heb. 'custom'
pl. minhag or minhagim
in Judaism, any religious custom that has acquired the legal binding force of Halakhah, the Jewish legal tradition. Because Halakhah itself can be considered to be based on custom, a minhag can come into force even though it presents an apparent contradiction to previous laws. The problem of minhagim has been a major subject for Judaic scholars.