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Definition of caulk verb from the Oxford Advanced American Dictionary

 

caulk

 verb
verb
NAmE//kɔk//
 
caulk somethingVerb Forms present simple I / you / we / they caulk
 
he / she / it caulks
 
past simple caulked
 
-ing form caulking
 
 
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to fill the holes or cracks in something, especially a ship, with a substance that keeps out water

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