-ation Definition
An action or process - e.g. hibernation.
The result of an action or process - e.g. accumulation.
Origin of -ation
Middle English -acioun from Old French -ation from Latin -ātiō -ātiōn- n. suff. -ā- stem vowel of verbs in -āre -tiō -tiōn- abstract n. suff
From American Heritage Dictionary of the English Language, 5th Edition
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From the Latin suffix -ātiō, an alternative form of -tiō (from whence -tion).
From Wiktionary
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