Definitions

1. adjective

resistant to or not affected by washing

“The water-resistant jacket is also washproof, making it suitable for outdoor activities.”

2. noun

a fabric or coating that is resistant to washing

“The manufacturer advertised the new fabric as a washproof material for its durability.”

3. adverb

in a way that is resistant to washing

“The instructions said to apply the coating washproof to ensure the paint lasts longer.”