HADD
| 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 |