1 [drej]
Also called dredging machine. any of various powerful machines for dredging up or removing earth, as from the bottom of a river, by means of a scoop, a series of buckets, a suction pipe, or the like.
a barge on which such a machine is mounted.
a dragnet or other contrivance for gathering material or objects from the bottom of a river, bay, etc.
verb (used with object), dredged, dredging.
to clear out with a dredge; remove sand, silt, mud, etc., from the bottom of.
to take, catch, or gather with a dredge; obtain or remove by a dredge.
verb (used without object), dredged, dredging.
to use a dredge.
Verb phrases
dredge up,
to unearth or bring to notice: We dredged up some old toys from the bottom of the trunk.
to locate and reveal by painstaking investigation or search: Biographers excel at dredging up little known facts.

1425–75; late Middle English (Scots) dreg-, Old English *drecg(e); see dray, draw

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2 [drej]
verb (used with object), dredged, dredging. Cookery.
to sprinkle or coat with some powdered substance, especially flour.

1590–1600; v. use of dredge (now obsolete or dial.) mixture of grains, late Middle English dragge, dregge, apparently to be identified with Middle English drag(g)e, dragie (disyllabic) sweetmeat, confection < Anglo-French drag(g)é, dragee, Old French (see dragée); compare similar dual sense of Medieval Latin dragētum, dragium

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dredge1 (drɛdʒ)
1.  Also called: dredger a machine, in the form of a bucket ladder, grab, or suction device, used to remove material from a riverbed, channel, etc
2.  another name for dredger
3.  to remove (material) from a riverbed, channel, etc, by means of a dredge
4.  (tr) to search for (a submerged object) with or as if with a dredge; drag
[C16: perhaps ultimately from Old English dragan to draw; see drag]

dredge2 (drɛdʒ)
to sprinkle or coat (food) with flour, sugar, etc
[C16: from Old French dragie, perhaps from Latin tragēmata spices, from Greek]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

late 15c., from Scottish dreg-boat "boat for dredging," or M.Du. dregghe "drag-net," one possibly from the other but hard to tell which came first; probably ultimately from root of drag. The verb is attested from c.1500. Related: Dredged; dredging.
Online Etymology Dictionary, © 2010 Douglas Harper
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Bible Dictionary

Dredge definition

(Job 24:6). See CORN.

Easton's 1897 Bible Dictionary
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Encyclopedia Britannica


large floating device for underwater excavation. Dredging has four principal objectives: (1) to develop and maintain greater depths than naturally exist for canals, rivers, and harbours; (2) to obtain fill to raise the level of lowlands and thus create new land areas and improve drainage and sanitation; (3) to construct dams, dikes, and other control works for streams and seashore; and (4) to recover subaqueous deposits or marine life having commercial value

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Rub puréed mixture over chicken, then dredge each piece in flour.
The plan costs nothing, and doesn't dredge up pesky issues such as separation
  of church and state.
According to the study, at their historical high, gray whales may have helped
  dredge up food for as many as a million seabirds.
Few people will find delight in the dredge that is hauled from the ocean floor.
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