I. ˈantə̇ˌdāt, ˈaan-, -tē- noun
Etymology: earlier antidate, probably from Middle French, from anti- anti- (II) + date
: a prior date ; especially : a date assigned to an event or affixed to a document that is earlier than the actual date of the event or document
recognition of prior military service to establish the antedate of seniority in certain civilian categories
II. “, ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷, usu -ad.+V transitive verb
Etymology: earlier antidate, probably from Middle French antidater, from antidate, n.
1.
a. : to date (as a check or deed) as of a time prior to that of execution
b. : to assign (an event) to a date prior to that of actual occurrence
archeological discoveries may show that the coming of man to this continent has not been antedated
2.
a. : to transfer to an earlier date or period
b. : to cause to occur earlier than expected : accelerate
3. archaic : anticipate
4. : to precede in time : come before in date
his death antedated his brother's