| Acronym | Definition |
|---|
| PIRF➣PetSafe Indoor Radio Fence (pet management) |
| PIRF➣Petroleum Industry Research Foundation |
| PIRF➣Peak Inspiratory Flow Rate (respiratory care) |
| PIRF➣Polyphase Image-Rejection Filter |
| PIRF➣Predominant Involvement of Radial-Sided Fingers (emboligenic stroke research) |