The Collaborative International Dictionary of English v.0.48:

Drift \Drift\, a.
   That causes drifting or that is drifted; movable by wind or
   currents; as, drift currents; drift ice; drift mud. --Kane.
   [1913 Webster]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

drift net
    n 1: a large fishnet supported by floats; it drifts with the
         current