- 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.
- a warp in an airfoil that gives a decrease in the angle of attack toward the tip.
- rainout.
- an utter failure.
- a person who has failed a course of training or study: air force washouts.
- to wash (the inside of something) so as to remove (dirt)
- to remove or be removed by washing
- to cancel or abandon (a sporting event)
- geology
- erosion of the earth's surface by the action of running water
- a narrow channel produced by this erosion
- informal
- a total failure or disaster
- an incompetent person
- a sporting or social event that is cancelled due to rain
- a decrease in the angle of attack of an aircraft wing towards the wing tip
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