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[wosh, wawsh] /wɒʃ, wɔʃ/
verb (used with object)
to apply water or some other liquid to (something or someone) for the purpose of cleansing; cleanse by dipping, rubbing, or scrubbing in water or some other liquid.
to remove (dirt, stains, paint, or any matter) by or as by the action of water (usually followed by out, off, etc.):
to wash grime out of clothing.
to free from spiritual defilement or from sin, guilt, etc.:
to be washed whiter than the snow.
to bathe, wet, or moisten with water or other liquid:
a meadow newly washed with morning dew.
to flow through, over, or against:
a shore or cliff washed by waves.
to carry, bring, remove, or deposit (something) by means of water or any liquid, or as the water or liquid does (often followed by up, down, or along):
The storm washed the boat up on the shore. A sailor was washed overboard.
to wear or diminish, as water does by flowing over or against a surface (often followed by out or away):
The rain had washed away the lettering on the stone.
(of water) to form by flowing over and eroding a surface:
The flood had washed a new channel through the bottom lands.
  1. to subject (earth or ore) to the action or force of water in order to separate valuable material.
  2. to separate (valuable material) in this way.
to purify (a gas or gaseous mixture) by passage through or over a liquid.
to cover with a watery or thin coat of color.
to overlay with a thin coat or deposit of metal:
to wash brass with gold.
Slang. launder (def 3).
verb (used without object)
to wash oneself:
After using the insecticide spray they washed completely.
to wash clothes:
Monday is the day we wash.
to cleanse anything with or in water or other liquid.
to undergo washing without injury, especially shrinking or fading:
fabrics guaranteed to wash.
Informal. to be found true, valid, or real when tested or closely scrutinized; stand being put to the proof:
His honesty won't wash.
to be carried or driven by water (often followed by along or ashore):
The boat had washed ashore in the night.
to flow or beat with a lapping sound, as waves on a shore.
to move along in or as in waves, or with a rushing movement, as water.
to be eroded, as by a stream or by rainfall:
a hillside that washes frequently.
to be removed by the action of water (often followed by away):
Much of the topsoil washes away each spring.
the act or process of washing with water or other liquid:
to give the car a wash.
a quantity of clothes, linens, etc., washed, or to be washed, at one time:
a heavy wash.
a liquid with which something is washed, wetted, colored, overspread, etc.:
She gave the room a wash of pale blue.
the flow, sweep, dash, or breaking of water:
The wash of the waves had drenched us.
the sound made by this:
listening to the wash of the Atlantic.
water moving along in waves or with a rushing movement:
the wash of the incoming tide.
the rough or broken water left behind a moving ship, boat, etc.; wake:
The little boats tossed about in the wash from the liner's propellers.
Aeronautics. the disturbance in the air left behind by a moving airplane or any of its parts:
wing wash.
any of various liquids for grooming or cosmetic purposes:
a hair wash.
a lotion or other liquid having medicinal properties, as an antiseptic solution or the like (often used in combination):
to apply wash to a skinned knee; mouthwash; eyewash.
Mining. minerals from which valuable material can be extracted by washing.
the wearing away of the shore by breaking waves.
a tract of land washed by the action of the sea or a river.
a marsh, fen, or bog.
a small stream or shallow pool.
a shallow arm of the sea or a shallow part of a river.
a depression or channel formed by flowing water.
Geology. alluvial matter transferred and deposited by flowing water.
Also called dry wash. Western U.S. the dry bed of an intermittent stream.
a broad, thin layer of color applied by a continuous movement of the brush, as in water-color painting.
Also called watershed, weathering. Architecture.
  1. an upper surface so inclined as to shed rain water from a building.
  2. any member of a building having such a surface.
Metalworking.. Also, washing. a thin coat of metal applied in liquid form:
a gold wash.
waste liquid matter, refuse, food, etc., from the kitchen, as for hogs; swill (often used in combination):
washy or weak liquor or liquid food.
the fermented wort from which the spirit is extracted in distilling.
Informal. an action that yields neither gain nor loss:
The company's financial position is a wash compared with last year.
capable of being washed without shrinking, fading, etc.; washable:
a wash dress.
Verb phrases
wash down,
  1. to clean completely by washing:
    to wash down a car.
  2. to facilitate the swallowing of (food or medicine) by drinking water or other liquid:
    to wash down a meal with a glass of wine.
wash out,
  1. to be removed by washing:
    The stain wouldn't wash out.
  2. to damage or demolish by the action of water:
    The embankment was washed out by the storm.
  3. Informal. to fail to qualify or continue; be eliminated:
    to wash out of graduate school.
  4. to become dim, indistinct, or blurred:
    The face of the watch washes out in sunlight.
wash up,
  1. to wash one's face and hands:
    Aren't you going to wash up? Dinner is almost ready.
  2. to wash (dishes, flatware, pots, etc.):
    I'll wash up the dishes, don't bother. We had someone in to wash up after the party.
  3. to end, especially ignominiously (usually in the passive):
    After that performance, he's all washed up as a singer.
come out in the wash,
  1. to have a good or satisfactory result; turn out eventually:
    The situation may look hopeless now, but it will all come out in the wash.
  2. to be revealed; become known.
wash one's hands of. hand (def 90).
Origin of wash
before 900; Middle English washen (v.), Old English wascan (cognate with Dutch wasschen, German waschen, Old Norse vaska) < Germanic *watskan, equivalent to *wat- (root of water) + *-sk- v. suffix + *-an infinitive suffix
Related forms
prewash, noun, verb (used with object)
rewash, verb
underwash, verb
well-washed, adjective
1. clean, lave, rinse, launder, mop, swab. 4. bedew. 5. bathe. 24. ablution, cleansing, bathing. 37. swamp, morass.


[wosh-out, wawsh-] /ˈwɒʃˌaʊt, ˈwɔʃ-/
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.
Informal. an utter failure.
Informal. a person who has failed a course of training or study:
air force washouts.
First recorded in 1870-75; noun use of verb phrase wash out Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for wash out
Contemporary Examples
Historical Examples
  • He showed the boy how to wash out the tub which the little fellow did with a will.

    In Apple-Blossom Time

    Clara Louise Burnham
  • And if you don't let the flume in this whole place'll wash out like flour.

    Still Jim Honor Willsie Morrow
  • "Throw a bucket into the boat, so that you can wash out the tender," said the skipper.

    Desk and Debit Oliver Optic
  • I do not think there is a soap in the world that will wash out this stain.

    Jewish Children Sholem Naumovich Rabinovich
  • Go to the wash basin there, old man, and wash out the horse feed.

    Two Wonderful Detectives Harlan Page Halsey
  • Saturate the spot two or three times, and then wash out in soapsuds.

  • I had to wash out this confounded boat-house, or be reported to Miss Bertha.

    Work and Win Oliver Optic
  • But being yellow to start, it has become green, and the color will not wash out.

    Just Patty Jean Webster
British Dictionary definitions for wash out

wash out

verb (adverb)
(transitive) to wash (the inside of something) so as to remove (dirt)
Also wash off. to remove or be removed by washing: grass stains don't wash out easily
(transitive) to cancel or abandon (a sporting event)
  1. erosion of the earth's surface by the action of running water
  2. a narrow channel produced by this erosion
  1. a total failure or disaster
  2. an incompetent person
a sporting or social event that is cancelled due to rain
(aeronautics) a decrease in the angle of attack of an aircraft wing towards the wing tip


the Wash, a shallow inlet of the North Sea on the E coast of England, between Lincolnshire and Norfolk


to apply water or other liquid, usually with soap, to (oneself, clothes, etc) in order to cleanse
(transitive; often foll by away, from, off, etc) to remove by the application of water or other liquid and usually soap: she washed the dirt from her clothes
(intransitive) to be capable of being washed without damage or loss of colour
(of an animal such as a cat) to cleanse (itself or another animal) by licking
(transitive) to cleanse from pollution or defilement
(transitive) to make wet or moist
often foll by away, etc. to move or be moved by water: the flood washed away the bridge
(esp of waves) to flow or sweep against or over (a surface or object), often with a lapping sound
to form by erosion or be eroded: the stream washed a ravine in the hill
(transitive) to apply a thin coating of paint, metal, etc, to
(transitive) to separate (ore, precious stones, etc) from (gravel, earth, or sand) by immersion in water
(intransitive; usually used with a negative) (informal, mainly Brit) to admit of testing or proof: your excuses won't wash with me this time
wash one's hands
  1. (euphemistic) to go to the lavatory
  2. (usually foll by of) to refuse to have anything more to do (with)
the act or process of washing; ablution
a quantity of articles washed together
a preparation or thin liquid used as a coating or in washing: a thin wash of paint, a hair wash
  1. any medicinal or soothing lotion for application to a part of the body
  2. (in combination): an eyewash
the flow of water, esp waves, against a surface, or the sound made by such a flow
  1. the technique of making wash drawings
  2. See wash drawing
the erosion of soil by the action of flowing water
a mass of alluvial material transported and deposited by flowing water
land that is habitually washed by tidal or river waters
the disturbance in the air or water produced at the rear of an aircraft, boat, or other moving object
gravel, earth, etc, from which valuable minerals may be washed
waste liquid matter or liquid refuse, esp as fed to pigs; swill
an alcoholic liquid resembling strong beer, resulting from the fermentation of wort in the production of whisky
(informal) come out in the wash, to become known or apparent in the course of time
Word Origin
Old English wæscan, waxan; related to Old High German wascan; see water
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for wash out



late Old English wæsc "act of washing" (see wash (v.)). Meaning "clothes set aside to be washed" is attested from 1789; meaning "thin coat of paint" is recorded from 1690s; sense of "land alternately covered and exposed by the sea" is recorded from mid-15c.



"disappointing failure," 1902, from verbal phrase wash out "obliterate, cancel," attested from 1570s, hence colloquial sense of "to call off (an event) due to bad weather, etc."



Old English wascan, wæscan, from Proto-Germanic *watskanan (cf. Old Norse vaska, Middle Dutch wasscen, Dutch wassen, German waschen), from stem *wat-, the source of water. Related: Washed; washing. Used mainly of clothes in Old English (the principal verb for washing the body, dishes, etc. being þwean). Washed-out "faded" is from 1837. Washed up is 1923 theater slang, from notion of washing up at the end of a job.

Online Etymology Dictionary, © 2010 Douglas Harper
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wash out in Medicine

wash (wŏsh)
v. washed, wash·ing, wash·es

  1. To cleanse, using water or other liquid, usually with soap, detergent, or bleach, by immersing, dipping, rubbing, or scrubbing.

  2. To make moist or wet.

  1. The act or process of cleansing or washing.

  2. A solution used to cleanse or bathe a part.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for wash out

wash out

verb phrase

  1. To fail, esp to fail to finish a pilot-training course and be qualified: Then I was washed out on a slight technicality (WWI flyers)
  2. To eliminate or cancel; scratch, scrub
  3. To lose all one's money; tap out: hustlers who really knew how to gamble. I always got washed out (1900s+)



  1. A drink to follow another, to wash it down; chaser: What for a wash? (1950s+)
  2. An elaborate justification; whitewash: It looked like a wash to me (1950s+)
  3. A balance between opposing values, cases, effects, etc; a moot situation; standoff, a TOSSUP: The net effect of the medical testimony was a wash/ I'd have to go to bed at the same time as my 6-year-old. So it's pretty much a wash/ the Ferraro factor. Was it a political plus, a minus, a wash? (1870s+ Stock market)


To prove acceptable; bear testing •Usually in the negative: Well, it just won't wash/ The stereotype of gay males as child molesters just doesn't wash any more/ That washes. I'll buy it (1849+)

Related Terms

hang out the wash, whitewash

[verb sense said to be fr a defective printed calico that could not be washed; third noun sense perhaps fr the notion that equal opposing elements wash each other out or away, or wipe the slate clean]



  1. A failure; a total fiasco; flop: I'm afraid our big birthday bash was a washout
  2. A student pilot or aviation cadet who fails to complete the course and become a qualified pilot: the major cause for the large number of ''washouts''

[WWI British military; origin unknown; perhaps because the student's name was washed or scrubbed from the roster]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Idioms and Phrases with wash out

wash out

Remove or be removed by washing; also, cause to fade by laundering. For example, Give it to me; I'll wash out that stain, or The bleach has really washed out that bright print. [ Mid-1700s ]
Wear away or be worn away by the flow of water, as in The river rose and washed out the dam, or The road has completely washed out. [ Mid-1700s ]
Deplete or be depleted of energy, as in Working on her feet all day just washed her out, or I just washed out after that long tennis match. [ Mid-1800s ]
Eliminate or be eliminated as unsatisfactory, as in He washed out of medical school after just one year, or After only two months as chairman I washed out. [ ; early 1900s ]
Cancel owing to bad weather, as in The picnic was washed out. [ ; early 1900s ]
Also see: washed out
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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