from The Century Dictionary.

  • noun A passage in a mine made or used for ventilating purposes; an airway.


Sorry, no etymologies found.


  • He explained that by reversing the fan they could draw the smoke up through the air-course, which would clear the main passages for a time.

    King Coal : a Novel

  • The girls had followed this procession in an air-course that exactly paralleled the trail.

    Angel Island

  • "One time in Cedar Mountain we go see boss, say air-course blocked.

    King Coal : a Novel

  • "Don't ye remember the time when the air-course was blocked before, and ye helped to get up the mules yeself?

    King Coal : a Novel


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