The Collaborative International Dictionary
Antiquation
Antiquation \An`ti*qua"tion\, n. [L. antiquatio, fr. antiquare.]
The act of making antiquated, or the state of being
antiquated.
--Beaumont.
Douglas Harper's Etymology Dictionary
antiquation
1640s, from Late Latin antiquationem (nominative antiquatio), noun of action from past participle stem of antiquare (see antique (adj.)).
Wiktionary
antiquation
n. 1 (context uncountable English) The process of becoming antique or obsolete. 2 (context countable English) Something that is antique or obsolete.