Any instrument used to gather or take by dragging; as: (aA dragnet for taking up oysters, etc., from their beds. (bA dredging machine. (cAn 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.