To bear without damage the operation of being washed; to be suitable for washing.

• Some calicoes do not wash.

To cover with a thin or watery coat of colour; to tint lightly and thinly.

To overlay with a thin coat of metal.

• steel washed with silver

chemistrynatural-sciencesphysical-sciencesTo pass or extract (a gas or gaseous mixture) through or over a liquid for the purpose of purifying it, especially by removing soluble constituents.

• Aqueous washings are done to remove water soluble impurities from organic products since normally the compound that you desire will be dissolved in the organic layer[…]

businessminingTo separate valuable material (such as gold) from worthless material by the action of flowing water.

To cause dephosphorization of (molten pig iron) by adding substances containing iron oxide, and sometimes manganese oxide.

To mix up tiles (before a new game) to make them random; to shuffle.

The bow wave, wake, or vortex of an object moving in a fluid, in particular:

nauticaltransportThe blade of an oar.

Ground washed away to the sea or a river.

• The wash of pastures, fields, commons, and roads, […]where rain water hath a long time settled.

A piece of ground washed by the action of water, or sometimes covered and sometimes left dry; the shallowest part of a river, or arm of the sea; also, a bog; a marsh.

• These Lincoln washes have devoured them.

A shallow body of water.

In arid and semi-arid regions, the normally dry bed of an intermittent or ephemeral stream.

• Near-synonyms: arroyo, wadi, nahal (synonymous other than regiolectal specificity)
• 1997, Stanley Desmond Smith, et al. Physiological Ecology of North American Desert Plants, Nature In some desert-wash systems (which have been termed “xero-riparian”)

A situation in which gains and losses or advantages and disadvantages are equivalent, or in which there is no net change.

• I knew that for every vote I cast for, say, the Republicans, some kid at a polling place nearby was casting his votes for the Democrats, so it was probably a wash or close to it.

slangbusinessfinanceA fictitious kind of sale of stock or other securities between parties of one interest, or by a broker who is both buyer and seller, and who minds his own interest rather than that of his clients.

Waste liquid, the refuse of food, the collection from washed dishes, etc., from a kitchen, often used as food for pigs; pigwash.

In distilling, the fermented wort before the spirit is extracted.

A mixture of dunder, molasses, water, and scummings, used in the West Indies for distillation.

• In order to augment the vinosity of the wash, many substances are recommended by Dr. Shaw, such as tartar, nitre, common salt, and the vegetable or mineral acids.

A thin coat of paint or metal laid on anything for beauty or preservation.

Ten strikes, or bushels, of oysters.

architectureThe upper surface of a member or material when given a slope to shed water; hence, a structure or receptacle shaped so as to receive and carry off water.

• a carriage wash in a stable

broadcastingmediatelevisionA lighting effect that fills a scene with a chosen colour.

A lighting fixture that can cast a wide beam of light to evenly fill an area with light, as opposed to a spotlight.

A total failure; a washout.