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English definition of “sig file”

sig file

noun [C]     (also signature file) IT
in an email, a few lines of information after a signature, giving information about the person who sent the email. When someone creates a sig file, it is added automatically each time they send an email: I created a new sig file for my new messages, replies, and forwards.
(Definition of sig file noun from the Cambridge Business English Dictionary © Cambridge University Press)
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