| signify | marquer |
| Signing of a contract | Conclusion de traité |
| Signor | Monsieur |
| Signoria of Venice | Seigneurie de Venise |
| signpost | poteau indicateur |
| SignWriting | SignWriting |
| Signy-Avenex | Signy-Avenex |
| Sigobert the Lame | Sigebert le Boiteux |
| Sigourney Weaver | Sigourney Weaver |
| Sigrid the Haughty | Świętosława |
| Sigrid Undset | Sigrid Undset |
| Sigriswil | Sigriswil |
| Sigtrygg Caech | Sigtryggr Caoch |
| Sigtrygg Silkbeard | Sigtryggr Silkiskegg |
| Sigtuna | Sigtuna |
| Sigtuna Municipality | Sigtuna |
| Sigulda | Sigulda |
| Sigur Rós | Sigur Rós |
| Sigurd | Siegfried |
| Sigurd I of Norway | Sigurd Ier de Norvège |
| Sigurd II of Norway | Sigurd II de Norvège |
| Sigurd Raschèr | Sigurd Rascher |
| Sigurd Wongraven | Sigurd Wongraven |
| Sigurimi | Sigurimi |
| Sigurður Nordal | Sigurdur Nordal |
| Sigyn | Sigyn |
| Sigöldulón | Sigöldulón |
| Sihanoukville | Sihanoukville |
| Siheung | Siheung |
| Sihui | Sihui |
| Siikainen | Siikainen |
| Siirt Province | Siirt |
| Sijilmasa | Sijilmassa |
| Sikasso Region | Sikasso |
| Sikelgaita | Sykelgaite de Salerne |
| Sikh | sikh |
| Sikhism | sikhisme |
| Sikhote-Alin | Sikhote-Aline |
| Sikka Regency | Sikka |
| Sikkim | Sikkim |
| Sikorsky Aircraft | Sikorsky Aircraft Corporation |
| Sikorsky Ilya Muromets | Sikorsky Ilia Mouromets |
| Sikorsky Russky Vityaz | Sikorsky Rouski Vitias |
| Siku | Siku |
| SIL International | SIL International |
| silage | fourrage ensilé |
| Silas | Force |
| Silat | Silat |
| Silba | Silba |
| Silbaš | Silbaš |
| Silberman | Silbermann |
| Silbervogel | Bombardier antipodal |
| Silbo Gomero language | Silbo |
| SILC | Secure internet live conferencing |
| Sile River | Sile |
| Sileighty | Nissan SilEighty |
| silence | calme |
