- ZEF stands for Zimbabwe Exiles Forum (Pretoria, South Africa)
- ZEF stands for Zero Emissions Forum
- ZEF stands for Zero-Employment Family (China)
- ZEF stands for Zygote Embryo Fetus
- ZEF stands for Zero Energy First (UK)
- ZEF stands for Zebrafish Embryo Fibroblast (biochemistry)
ZEF