Compare documents

a dragnet or other contrivance for gathering material or objects from the bed of a river etc. 2. any of various powerful machines for dredging up or removing earth, etc., as from the bottom of a river, by means of a scoop, a series of buckets, a suction pipe, or the like.

to clear out with a dredge; remove sand, silt, mud etc., from the bottom of. 4. to take, catch, or gather with a dredge; obtain or remove by a dredge. 5. to use a dredge.