Definition of over-dredge in US English:

over-dredge

verb

  • with object To dredge (an oyster bed) too much, so as to remove too many oysters.

Origin

Late 19th century; earliest use found in The Standard. From over- + dredge.

Pronunciation

over-dredge

/ˌəʊvəˈdrɛdʒ/