: a thin, flat ring that is made of metal, plastic, or rubber and that is used to make something (such as a bolt) fit tightly or to prevent rubbing
What made you want to look up washer? Please tell us where you read or heard it (including the quote, if possible).
Take Our 10-Question Quiz
The commonly misspelled words quiz
How strong is your vocabulary?
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes