| Noun | 1. | Piedmont - the plateau between the coastal plain and the Appalachian Mountains: parts of Virginia and North and South Carolina and Georgia and AlabamaSouth - the region of the United States lying to the south of the Mason-Dixon line |
| 2. | piedmont - a gentle slope leading from the base of a mountain to a region of flat land | |
| 3. | Piedmont - the region of northwestern Italy; includes the Po valley Italia, Italian Republic, Italy - a republic in southern Europe on the Italian Peninsula; was the core of the Roman Republic and the Roman Empire between the 4th century BC and the 5th century AD |