The Collaborative International Dictionary of English v.0.48:

Rustle \Rus"tle\, v. i. [imp. & p. p. Rustled; p. pr. & vb. n.
   Rustling.] [AS. hristlan to rustle; or cf. Sw. rusta to
   stir, make a riot, or E. rush, v.]
   1. To make a quick succession of small sounds, like the
      rubbing or moving of silk cloth or dry leaves.
      [1913 Webster]

            He is coming; I hear his straw rustle. --Shak.
      [1913 Webster]

            Prouder than rustling in unpaid-for silk. --Shak.
      [1913 Webster]

   2. To stir about energetically; to strive to succeed; to
      bustle about. [Slang, Western U.S.]
      [1913 Webster]

   3. To steal; -- used of livestock and esp. of cattle.
      [PJC]

   To rustle up To gather or find by searching; as, to rustle
      up some food for supper.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Rustle \Rus"tle\, v. t.
   To cause to rustle; as, the wind rustles the leaves.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rustle \Rus"tle\, n.
   A quick succession or confusion of small sounds, like those
   made by shaking leaves or straw, by rubbing silk, or the
   like; a rustling.
   [1913 Webster]

         When the noise of a torrent, the rustle of a wood, the
         song of birds, or the play of lambs, had power to fill
         the attention, and suspend all perception of the course
         of time.                                 --Idler.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rustle
    n 1: a light noise, like the noise of silk clothing or leaves
         blowing in the wind [syn: rustle, rustling, whisper,
         whispering]
    v 1: make a dry crackling sound; "rustling silk"; "the dry
         leaves were rustling in the breeze"
    2: take illegally; "rustle cattle" [syn: rustle, lift]
    3: forage food

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "rustle":
   abstract, and, annex, appropriate, bag, boost, borrow, celerity,
   cop, crib, crinkle, defraud, dispatch, embezzle, expedition,
   expeditiousness, extort, filch, froufrou, hook, hurry, hustle,
   lift, make off with, nip, palm, pilfer, pinch, poach, purloin,
   run away with, rustling, scrounge, shoplift, sibilance, sibilate,
   sibilation, snare, snatch, snitch, speed, speediness, steal,
   susurrate, susurration, susurrus, swiftness, swindle, swipe, swish,
   swishing, take, thieve, walk off with, whish, whisper,
   whispering