/sɪɡ/ or /sɪɡ/ (non-rhotic) and /ˈsaɪɡ/ (rhotic)

Definitions

1. noun

A signature, especially one written on a document to verify its authenticity.

“The lawyer required a sig on the contract before it could be finalized.”

2. verb

To sign or authenticate something, especially a document.

“Please sig the form and return it to us.”

3. abbreviation

Short for signature.

“The sig on the letter confirmed it was from the CEO.”