n. 1. Prior date; a date antecedent to another which is the actual date. [ 1913 Webster ]

2. Anticipation. [ Obs. ] Donne. [ 1913 Webster ]

v. t. [ imp. & p. p. Antedated; p. pr. & vb. n. Antedating. ] 1. To date before the true time; to assign to an earlier date; ; thus, to antedate a deed or a bond is to give it a date anterior to the true time of its execution. [ 1913 Webster ]

2. To precede in time. [ 1913 Webster ]

3. To anticipate; to make before the true time. [ 1913 Webster ]

And antedate the bliss above. Pope. [ 1913 Webster ]

Who rather rose the day to antedate. Wordsworth. [ 1913 Webster ]