HHW
| Acronym | Definition |
|---|---|
| HHW | Household Hazardous Waste (recycling and resource conservation) |
| HHW | Heating Hot Water |
| HHW | Haarlemse Honkbal Week (Netherlands) |
| HHW | High High Water (same as HW springs) |
| HHW | Hamilton High West |
| HHW | HTML (Hypertext Markup Language) Help Workshop (Microsoft) |