I first noticed this word being used to mean "refer back to" or "reply" in emails from Indian colleagues. India has a number of delightfully anachronistic English words still in use (such as the online article I read about how the "cads" had gotten away, but the "sleuths" were on their tail), which always amused me, but "please revert" at the end of an email...? My muttered response was usually, "to what?"
According to Dictionary.com:
Lately, it's been used twice by people who should know better, so I thought I would point it out.
It might be an actual word, but in this context it's like "refudiate" - yes, I know what you meant, but no. Don't.
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