washer

noun

1. Something that washes; especially an appliance such as a washing machine or dishwasher.

   “A £1.2 million carriage washer has opened at Norwich Crown Point, enabling Greater Anglia to clean its 58 Stadler trains. It is one of two new washers (the other is for '720s' at Southend), […]”

2. A person who washes (especially clothes) for a living; a washerman or washerwoman.
3. A person who washes their hands compulsively, as a symptom of obsessive-compulsive disorder.
4. A face cloth.
5. A flat piece of material, often of metal and often an annulus, placed beneath a nut or at some joint, to distribute pressure, alleviate friction, provide directionally differentiated friction (e.g. making the nut turn counter-clockwise only with difficulty), or prevent leakage.

   “To ensure that the stays are steamtight, a nut is then screwed tight up to copper washers inside and out.”

verb

1. (transitive)To fit (a mechanical device) with a washer.

name

1. A surname.