sun·na /ˈsʊ(n)(ˌ)nə, ˈsʌ(n)-/
  Sun·na n.  A collection of traditions received by the orthodox Mohammedans as of equal authority with the Koran.
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  Sunna
       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: Sunnah, hadith]