any instrument used to gather or take by dragging; as: (a) a dragnet for taking up oysters, etc., from their beds. (b) a dredging machine. (c) an iron frame, with a fine net attached, used in collecting animals living at the bottom of the sea.-very fine mineral matter held in suspension in water.-to catch or gather with a dredge; to deepen with a dredging machine.-a mixture of oats and barley.-to sift or sprinkle flour, etc., on, as on roasting meat.