The Collaborative International Dictionary of English v.0.48:

Ruffle \Ruf"fle\, v. t. [imp. & p. p. Ruffled; p. pr. & vb. n.
   Ruffling.] [From Ruff a plaited collar, a drum beat, a
   tumult: cf. OD. ruyffelen to wrinkle.]
   1. To make into a ruff; to draw or contract into puckers,
      plaits, or folds; to wrinkle.
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   2. To furnish with ruffles; as, to ruffle a shirt.
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   3. To oughen or disturb the surface of; to make uneven by
      agitation or commotion.
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            The fantastic revelries . . . that so often ruffled
            the placid bosom of the Nile.         --I. Taylor.
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            She smoothed the ruffled seas.        --Dryden.
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   4. To erect in a ruff, as feathers.
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            [the swan] ruffles her pure cold plume. --Tennyson.
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   5. (Mil.) To beat with the ruff or ruffle, as a drum.
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   6. To discompose; to agitate; to disturb.
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            These ruffle the tranquillity of the mind. --Sir W.
                                                  Hamilton.
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            But, ever after, the small violence done
            Rankled in him and ruffled all his heart.
                                                  --Tennyson.
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   7. To throw into disorder or confusion.
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            Where best
            He might the ruffled foe infest.      --Hudibras.
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   8. To throw together in a disorderly manner. [R.]
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            I ruffled up falen leaves in heap.    --Chapman
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   To ruffle the feathers of, to exite the resentment of; to
      irritate.
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WordNet (r) 3.0 (2006):

ruffled
    adj 1: shaken into waves or undulations as by wind; "the rippled
           surface of the pond"; "with ruffled flags flying" [syn:
           rippled, ruffled]
    2: having decorative ruffles or frills [syn: frilled,
       frilly, ruffled]