Plank n.
 1. A broad piece of sawed timber, differing from a board only in being thicker. See Board.
 2. Fig.: That which supports or upholds, as a board does a swimmer.
    His charity is a better plank than the faith of an intolerant and bitter-minded bigot.   --Southey.
 3. One of the separate articles in a declaration of the principles of a party or cause; as, a plank in the national platform. [Cant]
 Plank road, or Plank way, a road surface formed of planks. [U.S.]
 To walk the plank, to walk along a plank laid across the bulwark of a ship, until one overbalances it and falls into the sea; -- a method of disposing of captives practiced by pirates.
 Walk, v. t.
 1. To pass through, over, or upon; to traverse; to perambulate; as, to walk the streets.
    As we walk our earthly round.   --Keble.
 2. To cause to walk; to lead, drive, or ride with a slow pace; as, to walk one's horses; to walk the dog.  “ I will rather trust . . . a thief to walk my ambling gelding.”
 3.  To subject, as cloth or yarn, to the fulling process; to full.  [Obs. or Scot.]
 4. Sporting To put or keep (a puppy) in a walk; to train (puppies) in a walk. [Cant]
 5.  To move in a manner likened to walking. [Colloq.]
    She walked a spinning wheel into the house, making it use first one and then the other of its own spindling legs to achieve progression rather than lifting it by main force.    --C. E. Craddock.
 To walk one's chalks, to make off; take French leave.
 To walk the plank, to walk off the plank into the water and be drowned; -- an expression derived from the practice of pirates who extended a plank from the side of a ship, and compelled those whom they would drown to walk off into the water; figuratively, to vacate an office by compulsion.