| Acronym | Definition |
|---|
| HADD➣Homeowners Against Deficient Dwellings |
| HADD➣Hyperactive Agency Detection Device (cognitive theory of mind) |
| HADD➣Hydroxyapatite Deposition Disease |
| HADD➣Habitat Alteration, Disruption or Destruction |
| HADD➣Hikers Against Doo-Doo (grass roots organization to eliminate human and domesticated animal feces on hiking trails) |
| HADD➣Highest Average Daily Dose |
| HADD➣Hirst Arts Design Derby (contest) |
| HADD➣Hippies Against Drunk Driving |
| HADD➣hyper attention deficit disorder |