washer

US /ˈwɑː.ʃɚ/
UK /ˈwɑː.ʃɚ/
"washer" picture
1.

a machine for washing clothes, dishes, or other things

:
The new washer has a large capacity.
I need to buy a new dishwasher.
2.

a flat ring, usually of metal, rubber, or plastic, used to make a connection watertight or to prevent a nut or bolt from coming loose

:
Make sure to use a rubber washer for a tight seal.
The bolt needs a new metal washer.