| signaturmelodi | signature tune |
| Signau | Signau |
| Signe Anderson | Signe Toly Anderson |
| signera | mark |
| signerad | signed |
| signet | signet |
| signetring | signet ring |
| signifikans | significance |
| signifikant | significant |
| Signoria | Signoria |
| Signumfunktionen | Sign function |
| Signy-Avenex | Signy-Avenex |
| Sigourney Weaver | Sigourney Weaver |
| Sigrid | Sigrid |
| Sigrid Storråda | Sigrid the Haughty |
| Sigrid Undset | Sigrid Undset |
| Sigriswil | Sigriswil |
| Sigtuna | Sigtuna |
| Sigtuna kommun | Sigtuna |
| Sigulda | Sigulda |
| Sigur Rós | Sigur Rós |
| Sigurd | Sigurd |
| Sigurd Fafnesbane | Sigurd |
| Sigurd Hoel | Sigurd Hoel |
| Sigurd Ibsen | Sigurd Ibsen |
| Sigurd Jorsalafarare | Sigurd I of Norway |
| Sigurd Ormiöga | Sigurd Snake-in-the-Eye |
| Sigurimi | Sigurimi |
| Sigurjón Birgir Sigurðsson | Sjón |
| Sigvald Jarl | Sigvaldi Strut-Haraldsson |
| Sigvard Bernadotte | Count Sigvard Bernadotte of Wisborg |
| Sigvard Eklunds pris | Sigvard Eklund |
| Sigyn | Sigyn |
| Sihanoukville | Sihanoukville |
| Siheung | Siheung |
| Sihl | Sihl |
| SIIC | Supreme Islamic Iraqi Council |
| Siikais | Siikainen |
| Siirt | Siirt Province |
| sik | common whitefish |
| Sikaner | Sicani |
| Sikar | Coregonus |
| sikel | shekel |
| Sikeler | Sicels |
| sikh | Sikh |
| sikh- | Sikh |
| Sikhism | Sikhism |
| Sikkim | Sikkim |
| Siklós | Siklós |
| siklöja | vendace |
| Sikorsky | Sikorsky Aircraft |
| sikt | visibility |
| sikta | aim |
| sikta mot | aim at |
| sikta till | set one's sights on |
