Wordnet 3.0
NOUN (2)
1. 
 (Islam) a tradition based on reports of the sayings and activities of Muhammad and his companions; 
2. 
 (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, Sunna, hadith]
WordNet (r) 3.0 (2006):
Hadith
    n 1: (Islam) a tradition based on reports of the sayings and
         activities of Muhammad and his companions
    2: (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, Sunna,
       hadith]