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Source : Webster's Revised Unabridged Dictionary (1913)

-ation \-a"tion\ [L. -ationem. See {-tion}.]
   A suffix forming nouns of action, and often equivalent to the
   verbal substantive in -ing. It sometimes has the further
   meanings of state, and that which results from the action.
   Many of these nouns have verbs in -ate; as, alliterate
   -ation, narrate -ation; many are derived through the French;
   as, alteration, visitation; and many are formed on verbs
   ending in the Greek formative -ize (Fr. -ise); as,
   civilization, demoralization.