Definition of -ation in English:

-ation

Syllabification: -ation

suffix

1(Forming nouns) denoting an action or an instance of it: exploration hesitation
1.1Denoting a result or product of action: plantation

Origin

representing French -ation or Latin -ation-.

Definition of -ation in:

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Word of the day envenom
Pronunciation: enˈvenəm
verb
put poison on or into; make poisonous