| Acronym | Definition |
|---|
| GREF➣Gps Reference |
| GREF➣Global Real Estate & Facilities (Exxon) |
| GREF➣General Reserve Engineering Force (India) |
| GREF➣Gaming Regulators European Forum |
| GREF➣Graduate Research Environmental Fellowship |
| GREF➣Glycopeptide-Resistant Enterococcus Faecium (bacteria) |
| GREF➣Grass Ridge Equestrian Foundation (Sonoita, AZ) |
| GREF➣Groupe des Retraités Éducateurs sans Frontières |
| GREF➣GIP (Groupement d'Intérêt Public) Relation Emploi-Formation (French: Public Interest Group Relations Job Training) |