[ wosh-er, waw-sher ]
See synonyms for: washerwashers on Thesaurus.com

  1. a person or thing that washes.

  1. a flat ring or perforated piece of leather, rubber, metal, etc., used to give tightness to a joint, to prevent leakage, to distribute pressure, etc., as under the head of a nut or bolt.

Origin of washer

Middle English word dating back to 1275–1325; see origin at wash, -er1

Other words from washer

  • wash·er·less, adjective

Words Nearby washer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use washer in a sentence

British Dictionary definitions for washer


/ (ˈwɒʃə) /

  1. a person or thing that washes

  2. a flat ring or drilled disc of metal used under the head of a bolt or nut to spread the load when tightened

  1. any flat ring of rubber, felt, metal, etc, used to provide a seal under a nut or in a tap or valve seat

  2. chemical engineering a device for cleaning or washing gases or vapours; scrubber

  3. Australian a face cloth; flannel

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