Definition of waterproof verb from the Oxford Advanced American Dictionary

 

waterproof

 verb
verb
NAmE//ˈwɔt̮ərˌpruf//
 
, NAmE//ˈwɑt̮ərˌpruf//
 
waterproof somethingVerb Forms present simple I / you / we / they waterproof
 
,
 
he / she / it waterproofs
 
,
 
past simple waterproofed
 
,
 
-ing form waterproofing
 
,
 
 
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to make something waterproof
See the Oxford Advanced Learner's Dictionary entry: waterproof

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