| decrescente | lessening |
| decrescenza | decrease |
| decrescere | diminish |
| decrescita | degrowth |
| decretare | enact |
| Decreti di Nueva Planta | Nueva Planta decrees |
| decreto | decree |
| Decreto Crémieux | Adolphe Crémieux |
| decreto ministeriale | ministerial decree |
| DECT | Digital Enhanced Cordless Telecommunications |
| decuplicato | decuples |
| Decurtazione | Abbreviation |
| decìdere | determine |
| decìdersi | decide |
| dedalo | maze |
| dedicare | set aside |
| dedicare a | dedicate to |
| dedicarsi | devote oneself |
