GREF
| 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) |