| Term | Definition / Meaning / Stand for |
| DMI |
Danish Meteorological Institute |
| DRS |
Data Reporting System |
| DTR |
Daytime Temperature Range |
| DBT |
Decentralized Biogas Technology |
| DES |
Decision Support System |
| DTA |
Decision Threshold Analysis |
| DWR |
Deep Water Recharge |
| DGC |
Deforestation and Greenhouse Gas Emissions |
| DEMO |
Demonstration Project |
| DNDC |
Denitrification-Decomposition Model |
| DEE |
Department of Environment and Energy |
| DOEH |
Department of Environment, Health, and Safety |
| DGG |
Department of Green Growth |
| DME |
Department of Mineral and Energy |
| DSW |
Designated Surface Waters |
| DTA |
Designated Toxic Air Contaminant |
| DLG |
Deutscher Landwirtschafts-Gesellschaft (German Agricultural Society) |
| DTP |
Development and Transfer of Technologies Program |
| DLW |
Direct Low Water |
| DCN |
Disaster Communications Network |
| DCP |
Disaster Contingency Plan |
| DCC |
Disaster Coordination Center |
| DCR |
Disaster Cost Recovery |
| DDR |
Disaster Damage Recovery |
| DDT |
Disaster Damage Tracking |
| DDP |
Disaster Development Program |
| DHI |
Disaster Hazard Index |
| DMAP |
Disaster Management Action Plan |
| DMC |
Disaster Management Center |
| DMCC |
Disaster Mitigation and Coordination Center |
| DNC |
Disaster National Committee |
| DPE |
Disaster Preparedness Exercises |
| DPA |
Disaster Preparedness and Assistance |
| DPH |
Disaster Preparedness and Health |
| DPA |
Disaster Prevention Authority |
| DPC |
Disaster Prevention Committee |
| DPD |
Disaster Prevention Division |
| DRI |
Disaster Relief International |
| DRG |
Disaster Risk Governance |
| DRIP |
Disaster Risk Insurance Program |
| DRDC |
Disaster Risk and Damage Control |
| DRSR |
Disaster Risk and Social Response |
| DSB |
Disaster Safety Board |
| DSR |
Disaster Situation Report |
| DSSR |
Disaster Social Services Response |
| DTF |
Disaster Task Force |
| DTRS |
Disaster Transportation and Response System |
| DEMA |
Disaster and Emergency Management Agency |
| DBCP |
Disaster-Based Cost Prediction |
| DOP |
Dissolved Organic Phosphorus |
| DOD |
Dissolved Oxygen Depletion |
| DGGS |
Division of Geologic and Geophysical Surveys |
| DNB |
Do No Burn (related to air quality advisories) |
| DWC |
Drinking Water Contaminants |
| DWQ |
Drinking Water Quality |
| DWS |
Drinking Water Standards |
| DMC |
Dry Matter Content |
| DICE |
Dynamic Integrated Climate-Economy Model |
| DNC |
Dynamic Natural Capital |
| DEA |
Data Envelopment Analysis |
| DEAP |
Data Envelopment Analysis Program |
| DWT |
Deadweight Tonnage |
| DMU |
Decision-Making Unit |
| DSS |
Decision Support System |
| DST |
Decision Support Tool |
| DEFRA |
Department for Environment, Food, and Rural Affairs |
| DFID |
Department for International Development |
| DACF |
Department of Agriculture, Conservation, and Forestry |
| DOC |
Department of Commerce |
| DECC |
Department of Energy and Climate Change |