antedate UK US /ˌæntiˈdeɪt/ US /ˈæntiˌdeɪt/ verb [T]
► US to put a date on a document that is earlier than the date it is signed: »
an antedated check
► to have existed or happened before something else: antedate sth by 6 months/ten years, etc. »
Adverse information that antedates a consumer report by more than seven years is not reportable.
Financial and business terms. 2012.