Drift \Drift\, a. That causes drifting or that is drifted; movable by wind or currents; as, drift currents; drift ice; drift mud. --Kane. {Drift anchor}. See {Sea anchor}, and also {Drag sail}, under {Drag}, n. {Drift epoch} (Geol.), the glacial epoch. {Drift net}, a kind of fishing net. {Drift sail}. Same as {Drag sail}. See under {Drag}, n.