Waterproof definitions

wô'tər-pro͝of', wŏt'ər-
The definition of waterproof is something that keeps water out.

A plastic raincoat is an example of something that is waterproof.

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Impervious to or unaffected by water.
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Made of or coated or treated with rubber, plastic, or a sealing agent to prevent penetration by water.
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A material or fabric that is impervious to water.
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A raincoat or other such outer garment.
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To make impervious to water.
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That keeps out water completely; esp., treated with rubber, plastic, etc. so that water will not penetrate.
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Waterproof material.
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A raincoat or other outer garment of waterproof material.
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To make waterproof.
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Unaffected by water.
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Made of or covered with material that doesn't allow water in.
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To make waterproof or water-resistant.
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A substance or preparation for rendering cloth, leather, etc., impervious to water.
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Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; especially, an outer garment made of such material.
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Origin of waterproof

water +"Ž -proof