| Open format | Format ouvert |
| open freight car | wagon à plate-forme |
| Open front rounded vowel | Voyelle basse antérieure arrondie |
| Open front unrounded vowel | Voyelle basse antérieure non arrondie |
| Open Gaming License | Licence ludique libre |
| Open Gaz de France | Open Gaz de France |
| Open hearth furnace | Four à arc électrique |
| open house | journée du public |
| Open Innovation | Innovation ouverte |
| Open Invention Network | Open invention network |
| Open Inventor | Inventor |
| open lawn | pelouse |
| Open mapping theorem | Théorème de Banach-Schauder |
| Open Method of Coordination | Méthode ouverte de coordination |
| Open Motif | Open Motif |
| Open publishing | Publication ouverte |
| open railroad freight car | wagon à plate-forme |
| Open reading frame | Phase ouverte de lecture |
| Open reel | Enregistrement sonore |
| Open Romania | Open de Roumanie |
| open sea | large |
| open sea fishing | pêche en haute mer |
| Open SEAT | Open de Barcelone |
| Open set | Ensemble ouvert |
| Open Sound System | Open Sound System |
| Open source | Open Source |
| Open Source Definition | Open Source Definition |
| Open Source Development Labs | Open Source Development Labs |
| Open source hardware | Matériel informatique libre |
| Open Source Intelligence | Renseignement de sources ouvertes |
| Open source religion | Yoisme |
| Open source software | Open Source |
| Open Source Tripwire | Tripwire |
| open space | espace libre |
| Open star clusters | Amas ouvert |
| open the eyes | désabuser |
| Open to view | Nu |
| Open tuning | Accord ouvert |
| Open universe | Univers ouvert |
| Open University | Open University |
| Open Your Eyes | Open your eyes |
| Open Your Heart | Open Your Heart |
| open-air | en plein air |
