(n) (Islam) the way of life prescribed as normative for Muslims on the basis of the teachings and practices of Muhammad and interpretations of the Koran, Syn. hadith, Sunna
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
‖n. [ Ar. sunnah rule, law. ] A collection of traditions received by the orthodox Mohammedans as of equal authority with the Koran. [ 1913 Webster ]