DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   rift
       n 1: a gap between cloud masses; "the sun shone through a rift
            in the clouds"
       2: a narrow fissure in rock
       3: a personal or social separation (as between opposing
          factions); "they hoped to avoid a break in relations" [syn:
          rupture, breach, break, severance, rift, falling
    out]