'antedate' definitions:

Definition of 'antedate'

From: WordNet
verb
Be earlier in time; go back further; "Stone tools precede bronze tools" [syn: predate, precede, forego, forgo, antecede, antedate] [ant: follow, postdate]
verb
Establish something as being earlier relative to something else [syn: predate, antedate, foredate] [ant: postdate]

Synonyms of 'antedate'

From: Moby Thesaurus