1. To render impervious to water.

2. Impervious to water.

3. Cloth or a coat that is so.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• waterproff,
• waterprooof,
• waterpoof,
• waterprof,
• wetherproof,
• waterprrof,
• waterfroof,
• woaterproof,
• qaterproof,
• aaterproof,
• saterproof,
• waterprooft,
• waterroof,
• watterproof,
• waterproofer,
• waterproofar,
• Watermouf,
• Waterdropp,
• watterproff,
• waterprofe

• waterproofing,
• water vole,
• water polo,
• waterfall,
• water project,
• weatherproof,
• waterproofed,
• water program,
• Water pore,
• waterfowl,
• waterfront,
• waterbird,
• water boy,
• waterborne,
• waterbury,
• waterpower,
• waterford.

The adjective form of the word "waterproof" is "waterproof".

The plural form of the word "waterproof" is "waterproofs"

The singular form of the word "waterproof" is "waterproof".