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.

Also, wash-out. Aeronautics . a warp in an airfoil that gives a decrease in the angle of attack toward the tip. Compare washin .

rainout.

Informal . an utter failure.

Informal . a person who has failed a course of training or study

air force washouts.

noun

bust , fiasco , loser , disaster , downpour , erosion , failure , flop , gully