- DIFF stands for Difference
- DIFF stands for Differential
- DIFF stands for Dubai International Film Festival
- DIFF stands for Deutsches Institut für Fernstudienforschung (German: German Institute for Distance Education Research)
- DIFF stands for Do It For Free
- DIFF stands for Dominican International Film Festival
- DIFF stands for Dads in Families Foundation (Australia)
- DIFF stands for Euro-Rate Differential
DIFF