The Collaborative International Dictionary of English v.0.48:

parkway \park"way`\ n.
   A wide scenic road planted with trees.

   Syn: drive.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

parkway
    n 1: a wide scenic road planted with trees; "the riverside drive
         offers many exciting scenic views" [syn: drive,
         parkway]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "parkway":
   Autobahn, US highway, alley, alleyway, arterial, arterial highway,
   arterial street, artery, autoroute, autostrada, avenue,
   belt highway, blind alley, boulevard, bypass, byway, camino real,
   carriageway, causeway, causey, chaussee, circumferential, close,
   corduroy road, county road, court, crescent, cul-de-sac,
   dead-end street, dike, dirt road, drive, driveway, expressway,
   freeway, gravel road, highroad, highway, highways and byways,
   interstate highway, lane, local road, main drag, main road, mews,
   motorway, pave, paved road, pike, place, plank road,
   primary highway, private road, right-of-way, ring road, road,
   roadbed, roadway, route nationale, row, royal road, secondary road,
   speedway, state highway, street, superhighway, terrace,
   thoroughfare, through street, thruway, toll road, township road,
   turnpike, wynd



U.S. Gazetteer Places (2000):

Parkway, MO -- U.S. village in Missouri
   Population (2000):    280
   Housing Units (2000): 127
   Land area (2000):     0.308103 sq. miles (0.797984 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.308103 sq. miles (0.797984 sq. km)
   FIPS code:            56306
   Located within:       Missouri (MO), FIPS 29
   Location:             38.338832 N, 90.968668 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Parkway, MO
    Parkway


U.S. Gazetteer Places (2000):

Parkway-South Sacramento, CA -- U.S. Census Designated Place in California
   Population (2000):    36468
   Housing Units (2000): 11779
   Land area (2000):     4.840410 sq. miles (12.536603 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    4.840410 sq. miles (12.536603 sq. km)
   FIPS code:            55837
   Located within:       California (CA), FIPS 06
   Location:             38.511657 N, 121.452288 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Parkway-South Sacramento, CA
    Parkway-South Sacramento
    Parkway, CA
    Parkway