| Acronym | Definition |
|---|
| MWG | Messaging Working Group |
| MWG | Military World Games |
| MWG | Migration Working Group (various organizations) |
| MWG | Music Wire Gauge (pianos) |
| MWG | Milky Way Galaxy (astronomy) |
| MWG | Monitoring Working Group (various organizations) |
| MWG | Mississippi Writers Guild |
| MWG | Media Watch Global |
| MWG | Model Working Group |
| MWG | Membership Working Group (various organizations) |
| MWG | Match-Winning Goal (soccer) |
| MWG | Marketing Work Group (various organizations) |
| MWG | Microfinance Working Group (various organizations) |
| MWG | Mariners Welfare Guild (India) |
| MWG | Mobile Web Gateway |
| MWG | Media Workers Guild (San Francisco, CA) |
| MWG | Men with Guts (sports apparel company) |
| MWG | Music Wizard Group (est. 2001; Colorado) |
| MWG | Microworld of Gems (e-commerce business) |
| MWG | Measurements Working Group |
| MWG | Milliwatt Generator |
| MWG | Missile Warning Group |
| MWG | Maintainability Working Group |
| MWG | Munitions Work Group |
| MWG | Missile Working Group |
| MWG | Mid-West Group |
| MWG | Metres Water Gauge (pressure measurement) |