| Term | Full Form | Definition | Meaning |
|---|---|
| s | second |
| S | South |
| S | Sulfur |
| S | Entropy |
| S | Siemens |
| S | Spin |
| S | Serine |
| S | Socialdemokraterna |
| S | Small |
| S | Sheffield |
| s | strikethrough |
| S | Sonderklasse |
| S | Sport |
| S | Synthesis |
| S | Shrirangapattana |
| S-Video | Separate Video |
| S/N | Serial Number |
| S/N | Signal-to-Noise |
| S/N | Supernatant |
| S/o | Son of |
| S/O | Sold-Out |
| S/O | Shout-Out |
| S/O | Shipping Order |
| S/O | Significant Other |
| S/O | Security Officer |