WordNet (r) 3.0 (2006):

Noachian deluge
    n 1: (Biblical) the great deluge that is said in the Book of
         Genesis to have occurred in the time of Noah; it was
         brought by God upon the earth because of the wickedness of
         human beings [syn: Noah's flood, Noachian deluge, Noah
         and the Flood, the Flood]