Definition

To render impervious to water, as cloth, leather, etc.

Other Definitions

This word also has 2 other definitions:

WATERPROOF (adjective)

Proof against penetration or permeation by water; impervious to water; as, a waterproof garment; a waterproof roof.

WATERPROOF (noun)

1. A substance or preparation for rendering cloth, leather, etc., impervious to water. 2. Cloth made waterproof, or any article made of such cloth, o...