Definitions
1.nounAn appliance designed to wash something out."The cistern was fitted with washouts and air-valves."
2.nounThe cleaning of matter from a physiological system using a fluid."a bladder washout"
3.nounA period between clinical treatments in which any medication delivered as the first treatment is allowed to wash out of the person before the second treatment begins.
4.nounThe action whereby falling rainwater clean particles from the air.
5.nounA channel produced by the erosion of a relatively soft surface by a sudden gush of water.
6.nounA breach in a road or railway caused by flooding.
7.nounThe cleaning of the inside of a (locomotive) boiler to remove scale (limescale).
8.nounA disappointment or total failure; an unsuccessful person."As an actor, he was a complete washout, so he went back to accounting."
9.nounA sporting fixture or other event that could not be completed because of rain.
10.nounThe aerodynamic effect of a small twist in the shape of an aircraft wing