Definition of "backwash" in English

noun

1. (nautical) A backward flow of water, as from oars, a propeller, breaking waves, etc.

2. The similar flow of air from an aircraft engine.

3. The result or consequence of an event; an aftermath.

4. The saliva, spit or food particles that have flowed back into a drink after someone has drunk from it.

5. (economics) The situation where economic growth in one area harms other areas by attracting people and business away from those areas.

6. (education) washback

verb

1. To operate a water filter in the reverse direction in order to clean it.

2. (transitive) To affect with backwash.

3. To clean the oil from wool after combing.