The Collaborative International Dictionary of English v.0.48:

Piedmont \Pied"mont\, a. [F. pied foot + mont mountain.] (Geol.)
   Noting the region of foothills near the base of a mountain
   chain.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Piedmont
    n 1: the plateau between the coastal plain and the Appalachian
         Mountains: parts of Virginia and North and South Carolina
         and Georgia and Alabama
    2: a gentle slope leading from the base of a mountain to a
       region of flat land
    3: the region of northwestern Italy; includes the Po valley
       [syn: Piedmont, Piemonte]

U.S. Gazetteer Places (2000):

Piedmont, MO -- U.S. city in Missouri
   Population (2000):    1992
   Housing Units (2000): 959
   Land area (2000):     2.084711 sq. miles (5.399377 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    2.084711 sq. miles (5.399377 sq. km)
   FIPS code:            57422
   Located within:       Missouri (MO), FIPS 29
   Location:             37.153868 N, 90.695766 W
   ZIP Codes (1990):     63957
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Piedmont, MO
    Piedmont


U.S. Gazetteer Places (2000):

Piedmont, CA -- U.S. city in California
   Population (2000):    10952
   Housing Units (2000): 3859
   Land area (2000):     1.687860 sq. miles (4.371537 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.687860 sq. miles (4.371537 sq. km)
   FIPS code:            56938
   Located within:       California (CA), FIPS 06
   Location:             37.821994 N, 122.231405 W
   ZIP Codes (1990):     94611 94618
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Piedmont, CA
    Piedmont


U.S. Gazetteer Places (2000):

Piedmont, OK -- U.S. city in Oklahoma
   Population (2000):    3650
   Housing Units (2000): 1270
   Land area (2000):     43.823942 sq. miles (113.503485 sq. km)
   Water area (2000):    0.095708 sq. miles (0.247883 sq. km)
   Total area (2000):    43.919650 sq. miles (113.751368 sq. km)
   FIPS code:            58700
   Located within:       Oklahoma (OK), FIPS 40
   Location:             35.670849 N, 97.751903 W
   ZIP Codes (1990):     73078
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Piedmont, OK
    Piedmont


U.S. Gazetteer Places (2000):

Piedmont, SC -- U.S. Census Designated Place in South Carolina
   Population (2000):    4684
   Housing Units (2000): 1992
   Land area (2000):     8.584527 sq. miles (22.233822 sq. km)
   Water area (2000):    0.161160 sq. miles (0.417403 sq. km)
   Total area (2000):    8.745687 sq. miles (22.651225 sq. km)
   FIPS code:            56365
   Located within:       South Carolina (SC), FIPS 45
   Location:             34.704140 N, 82.461427 W
   ZIP Codes (1990):     29673
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Piedmont, SC
    Piedmont


U.S. Gazetteer Places (2000):

Piedmont, AL -- U.S. city in Alabama
   Population (2000):    5120
   Housing Units (2000): 2495
   Land area (2000):     9.754829 sq. miles (25.264889 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    9.754829 sq. miles (25.264889 sq. km)
   FIPS code:            59640
   Located within:       Alabama (AL), FIPS 01
   Location:             33.926005 N, 85.613137 W
   ZIP Codes (1990):     36272
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Piedmont, AL
    Piedmont


U.S. Gazetteer Places (2000):

Piedmont, WV -- U.S. town in West Virginia
   Population (2000):    1014
   Housing Units (2000): 499
   Land area (2000):     0.420156 sq. miles (1.088200 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.420156 sq. miles (1.088200 sq. km)
   FIPS code:            63604
   Located within:       West Virginia (WV), FIPS 54
   Location:             39.480232 N, 79.048086 W
   ZIP Codes (1990):     26750
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Piedmont, WV
    Piedmont