antedating
an-te-dat-ing
verb (present participle)
Occurring or existing earlier than something else in time.
"The Roman ruins were antedating the medieval castle."
noun (gerund)
The act of assigning an earlier date or preceding in time.
"The antedating of the document caused legal issues."
Thesaurus
Synonyms: forgo, precede, antecede, predate, forego, antedate, foredate