Definition of silt up phrasal verb from the Oxford Advanced Learner's Dictionary

 

silt up

 phrasal verb
phrasal verb
 
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Phrasal Verbs

silt somethingup

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silt up

 
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to block something with silt; to become blocked with silt Sand has silted up the river delta. The harbour has now silted up.
See the Oxford Advanced American Dictionary entry: silt up