Definitions for "Windage"
The difference between the diameter of the bore of a gun and that of the shot fired from it.
The sudden compression of the air caused by a projectile in passing close to another body.
The lateral drift of the bullet in flight caused by wind.
the retarding force of air friction on a moving object
Windage is a force created on an object by friction when there is relative movement between air and the object.
The left to right adjustment on the reticle.
exposure to the wind (as the exposed part of a vessel's hull which is responsible for wind resistance)
Wind resistance of the boat