| Abbreviation | Definition |
|---|---|
| SMCC | Syro-Malabar Catholic Church |
| SMCC | Syro-Malankara Catholic Church |
| SMCDSB | Simcoe Muskoka Catholic District School Board |
| SMCHS | Sindhi Muslim Co-operative Housing Society |
| SMCP | Sint Maarten Christian Party |
| SMCS | Shades Mountain Christian School |
| SMERF | Social Matrimony Education Religious and Fraternal |
| SMERF | Social Matrimony Education Religious and Fraternalsocial |
| SMFS | Southern Mississippi Funeral Services |
| SMGC | St. Maria Goretti Church |
| SMH | Sacrament Most Holy |
| SMIC | Sisters Missionary of the Immaculate Conception |
| SMILE | Serving Many In Life Everyday |
| SMILE | Special Ministry In Lay Evangelism |
| SMILE | Support Management Information Love And Encouragement |
| SMILE | Support Meaningful Involvement Love And Education |
| SMILE | Surround Me In Love Eternal |
| SMITE | Summer Missionary Intern Training for Evangelism |
| SMLC | Saint Martin's Lutheran Church |
| SMLS | Saint Mark Lutheran School |