Definition of "waterproofness" [waterproofness]

• The property of being waterproof. (noun)

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• "The Genesis also passed my freezer and water-bath tests for fog - and waterproofness."
• "For the commuter, Altura's range of jackets available on zyro.co.uk is purely practical, with high visibility and waterproofness cut for cycling."
• "When I took the headphones running indoors and outdoors, the padding's waterproofness didn't work and, at the risk of over-sharing, they became sweat reservoirs."