-tion
-tion
suffix forming nouns
[from Old French, from Latin -tiō, -tiōn-]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
-tion
or-sion
a suffix occurring in Latin loanwords, orig. nouns of action or state formed from verbs: relation; section; station; temptation.
Compare -ion. [< Latin -tiōn-, s. of -tiō]
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