| Acronym | Definition |
|---|
| YF➣Yellow Fever (disease) |
| YF➣Your Friend |
| YF➣Youth Fellowship |
| YF➣Yorkshire Forward (UK, regional development agency) |
| YF➣Prototype Fighter (US Air Force aircraft designation) |
| YF➣Covered Lighter (Self-Propelled; US Navy ship designation) |
| YF➣Range Tender (US DoD) |
| YF➣Provision Store Lighter (US DoD) |
| YF➣District Lighter, Covered (US Navy) |