AN'TEDATE, noun [Infra.] Prior date; a date antecedent to another. AN'TEDATE, verb transitive [Latin ante, and datum, given. See Date.] 1. To date before the true time; thus, to antedate a deed or a bond is to express a date anterior to the true time of its execution. 2. To anticipate; to take before the true time. And antedate the bliss above.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI