Definitions
able to keep water out or resist being penetrated by water
Word origin
From water + -proof. Compare West Frisian wetterproef (“waterproof”), Dutch waterproef (“waterproof”).
Used in a sentence
“The only waterproof plan and the one increasingly adopted by leading trades is the consolidation of the interests of all parties in a scheme of amalgamation.”
“Especially within an international framework, guarding this process is of the utmost importance. The eyes of the world are focussed on the action at hand and demand a waterproof plan and execution.”
“Unless you have a 100 percent waterproof plan to defraud insurance companies, I would suggest you don't do it.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Rain-ready”10 letters
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