The Collaborative International Dictionary of English v.0.48:

Rifle \Ri"fle\, v. t. [imp. & p. p. Rifled; p. pr. & vb. n.
   Rifling.] [F. rifler to rifle, sweep away; of uncertain
   origin. CF. Raff.]
   1. To seize and bear away by force; to snatch away; to carry
      off.
      [1913 Webster]

            Till time shall rifle every youthful grace. --Pope.
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   2. To strip; to rob; to pillage. --Piers Plowman.
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            Stand, sir, and throw us that you have about ye:
            If not, we'll make you sit and rifle you. --Shak.
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   3. To raffle. [Obs.] --J. Webster.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rifling \Ri"fling\, n.
   (a) The act or process of making the grooves in a rifled
       cannon or gun barrel.
   (b) The system of grooves in a rifled gun barrel or cannon.
       [1913 Webster]

   Shunt rifling, rifling for cannon, in which one side of the
      groove is made deeper than the other, to facilitate
      loading with shot having projections which enter by the
      deeper part of the grooves.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rifling
    n 1: the cutting of spiral grooves on the inside of the barrel
         of a firearm [syn: grooving, rifling]