-ation

from The Century Dictionary.

• noun A suffix of Latin origin, occurring in nouns of action, etc.

from the GNU version of the Collaborative International Dictionary of English.

• 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; ; many are derived through the French; ; and many are formed on verbs ending in the Greek formative -ize (Fr. -ise).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• suffix An action or process - e.g. hibernation.
• suffix The result of an action or process - e.g. accumulation.
• suffix A state or quality - e.g. exhilaration.