To cover something with planking.
to plank a floor or a ship
To bake (fish, etc.) on a piece of cedar lumber.
To lay down, as on a plank or table; to stake or pay cash.
to plank money in a wager
To harden, as hat bodies, by felting.
To splice together the ends of slivers of wool, for subsequent drawing.
To pose for a photograph while lying rigid, face down, arms at side, in an unusual place.