| Abbreviation | Definition |
|---|---|
| SMURF | Soviet Men Under Red Father |
| SMURF | Soviet Military Underground Resistance Force |
| SMV | Space Maneuverable Vehicle |
| SMW | Society of Military Widows |
| SMWG | Software Management Working Group |
| SN | (code for National Military Strategic Blueprint Functions) |
| SN | Seaman |
| Sn | Seaman - Navy |
| SN | Seaman Apprentice |
| SN | Small Nuclear |
| SN | Squadron Name |
| SN | Synchronization Node |
| SN1 | Seaman First Class |
| SNA | Survivable Network Analysis |
| SNA | System Network Architecture |
| SNACKO | SNACK Officer |
| SNAFU | Simultaneous Navy Army Foul Up |
| SNAFU | Situation Normal All Fouled Up |
| SNAFU | Situation Normal, All Fouled Up |
| SNAFUBAR | Situation Normal, All Fouled Up Beyond All Recognition |