1. [ noun ] (geology) the erosive process of washing away soil or gravel by water (as from a roadway)
Synonyms: wash

"from the house they watched the washout of their newly seeded lawn by the water"

Related terms: soil_erosion rain-wash wash_out
2. [ noun ] the channel or break produced by erosion of relatively soft soil by water

"it was several days after the storm before they could repair the washout and open the road"

Related terms: groove
3. [ noun ] (informal) someone who is unsuccessful
Synonyms: dud flop
Related terms: loser colloquialism
Similar spelling:   wash_out