— waterproofer , n. — waterproofness , n.
/waw"teuhr proohf', wot"euhr-/ , adj.
1. impervious to water.
2. rendered impervious to water by some special process, as coating or treating with rubber: a waterproof hat.
n.
3. Chiefly Brit. a raincoat or other outer coat impervious to water.
4. any of several coated or rubberized fabrics that are impervious to water.
v.t.
5. to make waterproof.
[ 1730-40; WATER + -PROOF ]