The Collaborative International Dictionary of English v.0.48:

Thoroughfare \Thor"ough*fare`\, n. [AS. [thorn]urhfaru.]
   1. A passage through; a passage from one street or opening to
      another; an unobstructed way open to the public; a public
      road; hence, a frequented street.
      [1913 Webster]

            A large and splendid thoroughfare.    --Motley.
      [1913 Webster]

   2. A passing or going through; passage. [R.]
      [1913 Webster]

            [Made] Hell and this world -- one realm, one
            continent
            Of easy thoroughfare.                 --Milton.
      [1913 Webster]

WordNet (r) 3.0 (2006):

thoroughfare
    n 1: a public road from one place to another

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "thoroughfare":
   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, drag, drive, driveway,
   expressway, freeway, gravel road, highroad, highway,
   highways and byways, interstate highway, lane, local road,
   main drag, main road, mews, motorway, parkway, path, 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, through street, thruway, toll road,
   township road, track, turnpike, way, wynd