windage Meaning, Definition & Usage

  1. noun the retarding force of air friction on a moving object
  2. noun the space between the projectile of a smoothbore gun and the surface of the bore of the gun
  3. noun exposure to the wind (as the exposed part of a vessel's hull which is responsible for wind resistance)
    wind exposure.
  4. noun the deflection of a projectile resulting from the effects of wind
    wind deflection.

WordNet

Wind"age noun
Etymology
From Wind air in motion.
Definitions
  1. (Gun.) The difference between the diameter of the bore of a gun and that of the shot fired from it.
  2. The sudden compression of the air caused by a projectile in passing close to another body.

Webster 1913