| Abbreviation | Definition |
|---|---|
| nego | I refuse, say no |
| NEM.CON. | nemine contradicente |
| NI | Novus Imperium |
| NIL | Nodus In Largo |
| NO | Nomine Officii |
| NOV | Non Obstante Veredicto |
| NS | Non Sequitur |
| NULL | Nulla figura |
| O | Omni |
| OA | Oficina Anticorrupción |
| OD | Omne in Die |
| OFM | Ordo Fratrum Minori |
| OFM | Ordo Fratrum Minorum/Latin |
| OSPAAAL | Organization of Solidarity of African, Asian, and Latin American People |
| OSPAAL | Organization for the Solidarity of the Peoples of Asia, Africa and Latin America |
| OTL | Ordo Templi Luciferi |
| OTO | Ordo Templi Orientis |
| OTS | Ordo Templi Sensibilium |
| OTS | Ordus Templii Sensibilia |
| P | Pax |