| Term | Definition |
| deference | submission to another’s will, respect, courtesy |
| definitive | conclusive, providing the final word |
| degenerate | to break down, to deteriorate |
| deleterious | harmful |
| delineate | to describe accurately, to draw in outline |
| delude | to deceive |
| deluge | a flood |
| demagogue | leader of people, but not in a good way, creates trouble and manipulates people |
| denizen | inhabitant |
| depravity | extreme wickedness or corruption |
| deprecate | to express disapproval of |
| deprecate | to represent something as being of little value |
| deride | to ridicule, to laugh at contemptuously |