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Synonyms

backdate

American  
[bak-deyt] / ˈbækˌdeɪt /

verb (used with object)

backdated, backdating

  1. to date earlier than the actual date; predate; antedate.

    Backdate the letter so he'll think I wrote it last week.
backdate British  
/ ˌbækˈdeɪt /

verb

  1. (tr) to make effective from an earlier date

    the pay rise was backdated to August
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of backdate

An Americanism dating back to 1945–50; back 2 + date 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.