Third-person singular simple present indicative form of backdate.(verb)
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Use "backdates" in a sentence
"When my teen reverie for the likes of Margaret Thatcher and Steve Jobs takes over, Slim chimes in, "Make sure you mention that he is a control freak who backdates options and doesn't tell shareholders he has a terminal illness.""
"Answer: Costco automatically backdates your membership to renew on the date it expired, not on the actual date you renewed."
"It deliberately provides a 'get out of jail free card' to the administration's top torture officials, and backdates that card nine years."