W/O
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| Acronym | Definition |
|---|---|
| W/O | Without |
| W/O | Work Order |
| W/O | Wife of |
| W/O | Week Of |
| W/O | Water in Oil (emulsion used widely in cosmetics) |
| W/O | Write On |
| W/O | Written Off |
| W/O | Walkover (gaming; elections) |
| W/O | Washington/Obayashi (Joint Venture) |