| Acronym | Definition |
|---|
| EWST | Elevated Water Storage Tank (various locations) |
| EWST | Engineered Wood Siding and Trim (composite panel) |
| EWST | Endurance Shuttle Walk Test |
| EWST | European Wakesurf Tour |
| EWST | Electronic Warfare Simulation Technology (software) |
| EWST | Ewangelikalnej Wyzszej Szkole Teologicznej (Polish: Evangelical School of Theology) |
| EWST | E-Waste Corporation |
| EWST | EW Simulation Technology Limited |
| EWST | Emirates World Scaffolding Trading (United Arab Emirates) |
| EWST | Electrical/Water Systems Technician (Nigeria) |
| EWST | Equal World-Sheet Time (physics) |
| EWST | European Week of Science and Technology (conference) |
| EWST | Embedded Weapon System Trainer |