Source : Webster's Revised Unabridged Dictionary (1913)

Fossilize \Fos"sil*ize\, v. t. [imp. & p. p. {Fossilized}; p.
   pr. & vb. n. {Fossilizing}.] [Cf. F. fossiliser.]
   1. To convert into a fossil; to petrify; as, to fossilize
      bones or wood.

   2. To cause to become antiquated, rigid, or fixed, as by
      fossilization; to mummify; to deaden.

            Ten layers of birthdays on a woman's head Are apt to
            fossilize her girlish mirth.          --Mrs.
                                                  Browning.

Fossilized \Fos"sil*ized\, a.
   Converted into a fossil; antiquated; firmly fixed in views or
   opinions.

         A fossilized sample of confused provincialism. --Earle.

Source : WordNet®

fossilized
     adj : set in a rigidly conventional pattern of behavior, habits,
           or beliefs; "obsolete fossilized ways"; "an ossified
           bureaucratic system" [syn: {fossilised}, {ossified}]