Definition of dredges:
(v) :
To make a channel deeper or wider using a dredge.
(v) :
To bring something to the surface with a dredge.
(n) :
The act of dredging.
(v) :
(transitive, usually with "up") To unearth.
(v) :
(cooking, transitive) To sprinkle (food) with spices or seasonings, using a dredge.
(n) :
(cooking, countable) A large shaker for sprinkling spices or seasonings during food preparation.