Definition of -ion in English:

-ion

Syllabification: -ion

suffix

1Forming nouns denoting verbal action: communion
1.1Denoting a resulting state or product: oblivion opinion

Origin

via French from Latin -ion-.

Definition of -ion in:

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Word of the day antebellum
Pronunciation: ˌantɪˈbɛləm
adjective
occurring or existing before a particular war…