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1. Not permitting the passage of water
   "The defendant agreed to put the said house in good repair, including making the roof waterproof";
   - rainproof, waterproofed

1. Any fabric impervious to water
    
2. A water-resistant coat
   - raincoat

1. Make watertight
   "Waterproof the coat"

Derived forms: waterproofs, waterproofed, waterproofing

See also: tight

Type of: cloth, coat, fabric, material, seal, seal off, textile

Encyclopedia: Waterproof, Louisiana