say it: WAH-showt
washout is a noun meaning "the channel or break produced by erosion of relatively soft soil by water". It carries 3 recorded senses.
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”
the erosive process of washing away soil or gravel by water (as from a roadway)
“from the house they watched the washout of their newly seeded lawn by the water”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for washout come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.