Definitions of -ation
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.