The Collaborative International Dictionary of English v.0.48:

Perpetuation \Per*pet`u*a"tion\, n. [Cf. F. perp['e]tuation.]
   The act of making perpetual, or of preserving from extinction
   through an endless existence, or for an indefinite period of
   time; continuance. --Sir T. Browne.
   [1913 Webster]

WordNet (r) 3.0 (2006):

perpetuation
    n 1: the act of prolonging something; "there was an indefinite
         prolongation of the peace talks" [syn: prolongation,
         protraction, perpetuation, lengthening]