The Collaborative International Dictionary of English v.0.48:

Waterproof \Wa"ter*proof`\, a.
   Proof against penetration or permeation by water; impervious
   to water; as, a waterproof garment; a waterproof roof.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Waterproof \Wa"ter*proof`\, n.
   1. A substance or preparation for rendering cloth, leather,
      etc., impervious to water.
      [1913 Webster]

   2. Cloth made waterproof, or any article made of such cloth,
      or of other waterproof material, as rubber; esp., an outer
      garment made of such material.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Waterproof \Wa"ter*proof`\, v. t.
   To render impervious to water, as cloth, leather, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

waterproof
    adj 1: not permitting the passage of water [syn: rainproof,
           waterproof, waterproofed]
    n 1: any fabric impervious to water
    2: a water-resistant coat [syn: raincoat, waterproof]
    v 1: make watertight; "Waterproof the coat"

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "waterproof":
   airtight, bold, close, compact, dampproof, dripproof, dustproof,
   dusttight, fast, fireproof, firm, fit for sea, floodproof,
   gasproof, gastight, hermetic, hermetically sealed, insulate,
   leakproof, lightproof, lighttight, moistureproof, oilproof,
   oiltight, proof, rainproof, raintight, sea-kindly, sealed,
   seaworthy, seepproof, shut fast, smokeproof, smoketight, snug,
   soundproof, staunch, stiff, stormproof, stormtight, tender, tight,
   water-repellant, watertight, weatherly, weatherproof, windproof,
   windtight



U.S. Gazetteer Places (2000):

Waterproof, LA -- U.S. town in Louisiana
   Population (2000):    834
   Housing Units (2000): 427
   Land area (2000):     0.696235 sq. miles (1.803241 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.696235 sq. miles (1.803241 sq. km)
   FIPS code:            79940
   Located within:       Louisiana (LA), FIPS 22
   Location:             31.806938 N, 91.385233 W
   ZIP Codes (1990):     71375
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Waterproof, LA
    Waterproof