| Acronym | Definition |
|---|
| STD | Standard |
| STD | Stunde (German: Hour) |
| STD | Sexually Transmitted Disease |
| STD | Doctor(ate) of Sacred Theology (degree) |
| STD | Stunden (German: Hours) |
| STD | Standing |
| STD | Steady |
| STD | Standard Deviation |
| STD | Short Term Disability (Insurance) |
| STD | Short Term Disability |
| STD | Steward |
| STD | Solar Terrestrial Dispatch |
| STD | Security Tools Distribution (Knoppix) |
| STD | State Transition Diagram |
| STD | Save the Date |
| STD | São Tome and Principe Dobra (ISO currency code) |
| STD | Saves the Day (band) |
| STD | Sigma Tau Delta (Sorority and English Honors Society) |
| STD | Seize the Day |
| STD | Second To Die (life insurance) |
| STD | St. David |
| STD | Software Test Description |
| STD | Subscriber Trunk Dialing |
| STD | Studiendirektor |
| STD | Salinity, Temperature, Depth |
| STD | Set Direction Flag |
| STD | Star Destroyer (Star Wars) |
| STD | Saturation Transfer Difference |
| STD | Science and Technology for Development (European Union) |
| STD | Synthetic Training Device |
| STD | Severe Tire Damage (band) |
| STD | Scheduled Time of Departure |
| STD | Stud Book |
| STD | Science and Technology Division |
| STD | Spyro the Dragon (game) |
| STD | Shaggy 2 Dope (Insane Clown Posse band member) |
| STD | Schaffer the Darklord (entertainer) |
| STD | Standard Trunk Dialing |
| STD | South Tibetan Detachment |
| STD | Socially-Transmitted Disease (aka Sexually-Transmitted Disease) |
| STD | Software Test Design |
| STD | Special Taxing District |
| STD | Software Test Document |
| STD | Santo Domingo, Venezuela - Mayor Humberto Vivas Guerrero (Airport Code) |
| STD | Serial Transmit Data |
| STD | Storage Technology Division |
| STD | Selective Transmit Diversity |
| STD | Small Target Detection |
| STD | Stick the Dealer (euchre) |
| STD | Space-Time Diagram |
| STD | Screw the Dealer (Euchre card game house rule) |
| STD | Safely Tolerated Dose |
| STD | Sub Tropical Depression |
| STD | Simplified Trellis Decoder |
| STD | Student Technical Director |
| STD | Sham Tseng Development (Hong Kong) |
| STD | Spanish Training Division |
| STD | System Technology Demonstrator |
| STD | Stephen, Thomas, Dalton (Sacramento band) |
| STD | Spectral Theory of Diffraction |
| STD | Singly-Testable Dependent |
| STD | Step Transaction Doctrine |
| STD | Spatial-Temporal Detector |
| STD | Solutions for the Disturbed (band) |
| STD | Systems Target Decoder (MPEG systems) |
| STD | Society for Theological Discussion |
| STD | Single-Trial Decoding |
| STD | Standard Offline Test Driver |
| STD | System Test Directive |
| STD | Subcutaneous Tissue Disorder |
| STD | Swimmer Transportation Device |