dredge verb definition in Coastlines and the sea topic from the Oxford Advanced Learner's Dictionary


 verb: Coastlines and the sea topic
[transitive, intransitive] dredge (something) (for something) to remove mud, stones, etc. from the bottom of a river, canal, etc. using a boat or special machine, to make it deeper or to search for something They're dredging the harbour so that larger ships can use it. They dredge the bay for gravel.