OVNI
| Acronym | Definition |
|---|---|
| OVNI | Objeto Volador No Identificado (Spanish: Unidentified Flying Object) |
| OVNI | Objet Volant Non-Identifié (French: Unidentified Flying Object) |
| OVNI | Oggetto Volante Non Identificato (Italian: Unidentified Flying Object) |
| OVNI | Objecto Voador Não Identificado (Portuguese: Unidentified Flying Object) |
| OVNI | Oficina Virtual Na Internet (Portuguese: Virtual Workshop on the Internet; internet-based human resources training) |
| OVNI | Orchestre à vents Non-Indentifié |