SIGI
| Acronym | Definition |
|---|---|
| SIGI | Selective Insurance Group, Inc. (various locations) |
| SIGI | Sisterhood Is Global Institute |
| SIGI | Space Integrated GPS/INS (Global Positioning System/Inertial Navigation System; Honeywell International) |
| SIGI | Saskatchewan Infrastructure Growth Initiative (Canada) |
| SIGI | System for Interactive Guidance and Information |