| Acronym | Definition |
|---|
| WNO➣Welsh National Opera |
| WNO➣Washington National Opera (Washington, DC) |
| WNO➣Wet Nationale Ombudsman |
| WNO➣World Nap Organization |
| WNO➣Wonderful Night Out (Wonderscope Children's Museum of Kansas City; Kansas) |
| WNO➣Wharton and Northern Railroad |