- impervious to water.
- rendered impervious to water by some special process, as coating or treating with rubber: a waterproof hat.
- a raincoat or other outer coat impervious to water.
- any of several coated or rubberized fabrics that are impervious to water.
- to make waterproof.
- not penetrable by water
- a waterproof garment, esp a raincoat
- to make (a fabric, item of clothing, etc) waterproof
