HLW
| Acronym | Definition |
|---|---|
| HLW | Herz Lungen Wiederbelebung (German: Cardiopulmonary Resuscitation) |
| HLW | High Level Waste |
| HLW | How Language Works |
| HLW | High Low Water (same as LW neaps) |
| HLW | Honeder Lacher Wallner (Austria; software and web design firm) |
| HLW | Hybrid Large White (turkeys) |