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a suffix occurring in words of Latin origin, used to form abstract nouns from verbs or stems not identical with verbs, whether as expressing action (revolution; commendation), or a state (contrition; starvation), or associated meanings (relation; temptation).
Also, -ation, -cion, -ion, -sion, -xion.
Origin of -tion
< Latin -tiōn- (stem of -tiō), equivalent to -t(us) past participle suffix + -iōn- -ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for tion


indicating state, condition, action, process, or result: election, prohibition Compare -ation, -ion
Word Origin
from Old French, from Latin -tiō, -tiōn-
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tion


syllable formed when the word-forming element -ion (from Latin -io) is fixed to a base or to another suffix ending in -t or -te.

Online Etymology Dictionary, © 2010 Douglas Harper
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