Noun

1. A main road or highway.
   • 1883, Robert Louis Stevenson, The Black Arrow, ch. 6,

     There, a few yards before them, was the high road from Risingham to Shoreby, lying, at this point, between two even walls of forest.

2. A course of action which is honorable, dignified, or respectable.
   • 1982, Thomas Griffith, "A Tilt Called Cynicism," Time, 22 Nov.,

     The high road of public service and the low road of political advantage seem inextricably intertwined.