| First Council of Constantinople | Premier concile de Constantinople |
| First Council of Lyon | Ier concile de Lyon |
| First Council of Nicaea | Premier concile de Nicée |
| First Council of the Lateran | Ier concile du Latran |
| first course | hors-d'œuvre |
| first cousin once removed | petit cousin germain |
| First Crusade | Première croisade |
| first day cover | enveloppe premier jour |
| First day of issue | Premier jour |
| First dynasty of Egypt | Ire dynastie égyptienne |
| First Employment Contract | Contrat première embauche |
| First Epistle of John | Première épître de Jean |
| First Epistle of Peter | Première épître de Pierre |
| First Epistle to the Corinthians | Première épître aux Corinthiens |
| First Epistle to the Thessalonians | Première épître aux Thessaloniciens |
| First Epistle to Timothy | Première épître à Timothée |
| First Fleet | First Fleet |
| first floor | rez-de-chaussée |
| First Folio | Premier Folio |
| First French Empire | Premier Empire |
| first gear | première |
| First Geneva Convention | Première Convention de Genève |
| First German Antarctica Expedition | Expédition Gauss |
| first grade | CP |
| First Impressions of Earth | First Impressions of Earth |
| First Intermediate Period of Egypt | Première période intermédiaire égyptienne |
| First International | Association internationale des travailleurs |
| First Intifada | Première Intifada |
| First Jewish-Roman War | Première guerre judéo-romaine |
| First King of Shannara | Le Premier roi de Shannara |
| first lady | première dame |
| First Lady of the United States | Première dame des États-Unis |
| First language | Langue maternelle |
| First League of Serbia and Montenegro | Championnat de Serbie de football |
| first lieutenant | lieutenant |
