What is the meaning of -tion?

Used to form nouns meaning "the action of (a verb)" or "the result of (a verb)". Words ending in this suffix are almost always derived from a similar Latin word; a few (e.g. gumption) are not derived from Latin and are unrelated to any verb. More often, -ation is used.

-tion; making nouns.

Used to indicate action, condition, result or effect; -tion

-tion

-tion; making nouns. See also -else, -ing and -ning.

Source: wiktionary.org