Main definitions of sig in US English:

: sig1SIG2

sig1

noun

Computing
informal
  • A short personalized message at the end of an email.

    • ‘How do I tell a friend her email sig is really annoying?’

Origin

1990s: abbreviation of signature.

Pronunciation

sig

/siɡ/

Main definitions of sig in US English:

: sig1SIG2

SIG2

abbreviation

Computing
  • Special interest group.

Pronunciation

SIG

/siɡ/