antedate(noun, verb) noun1. Prior date; a date antecedent to another which is the actual date.2. (obsolete) anticipation verb1. be earlier in time; go back furtherSimilar word(s): antecede, forego, forgo, precede, predateDefinition categories: stative2. establish something as being earlier relative to something elseSimilar word(s): foredate, predateDefinition categories: change, chronologise, chronologize