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Meaning of SIS

What Does SIS Mean? (Using SIS Online)

SIS means "Sister".
Summary of Key Points

Definition for SIS

SIS means "Sister". This is the most common definition for SIS on Snapchat, WhatsApp, Facebook, and Twitter. Here is some more information about SIS:

SIS
Definition:Sister
Type:Abbreviation
Guessability:
1: Easy to guess
Typical Users:
Adults and Teenagers
A Text with SIS

Using SIS on a Cell Phone (SMS Texts, Whatsapp, and Yubl)

 
SIS
 

Popular Themes on Cyber Definitions