| Acronym | Definition |
|---|
| OSFL➣Olive-Sided Flycatcher (bird species; Contopus cooperi) |
| OSFL➣Old School for Life |
| OSFL➣Organización Sin Fines de Lucro (Spanish: Not-for-Profit Organization) |
| OSFL➣Orchestra of the Southern Finger Lakes (Corning, NY) |
| OSFL➣Olympian Sunday Football League (UK) |
| OSFL➣Office Supplies for Less |
| OSFL➣Operation Sports Football League (gaming) |