a washing out of earth, gravel, etc., by water, as from an embankment or a roadway by heavy rain or by a flash flood.
the hole, break
, or erosion produced by such a washing out.
3. Also, wash-out. Aeronautics.
a warp in an airfoil that gives a decrease in the angle of attack toward the tip. Compare washin
Informal. an utter failure.
a person who has failed a course of training or study: air force washouts.
1870–75; noun use of verb phrase wash out