| Term | Definition |
| demarcation | the marking of boundaries or categories |
| demean | to lower the status or stature of something |
| demure | quiet, modest, reserved |
| denigrate | to belittle, diminish the opinion of |
| denounce | to criticize publicly |
| deplore | to feel or express sorrow, disapproval |
| depravity | wickedness |
| deprecate | to belittle, depreciate |
| derelict | abandoned, run-down |
| deride | to laugh at mockingly, scorn |
| derivative | taken directly from a source, unoriginal |
| desecrate | to violate the sacredness of a thing or place |
| desiccated | dried up, dehydrated |
| desolate | deserted, dreary, lifeless |
| despondent | feeling depressed, discouraged, hopeless |
| despot | one who has total power and rules brutally |
| destitute | impoverished, utterly lacking |
| deter | to discourage, prevent from doing |
| devious | not straightforward, deceitful |
| dialect | a variation of a language |