The Collaborative International Dictionary of English v.0.48:

Spurn \Spurn\ (sp[^u]rn), v. t. [imp. & p. p. Spurned
   (sp[^u]rnd); p. pr. & vb. n. Spurning.] [OE. spurnen to
   kick against, to stumble over, AS. spurnan to kick, offend;
   akin to spura spur, OS. & OHG. spurnan to kick, Icel. spyrna,
   L. spernere to despise, Skr. sphur to jerk, to push.
   [root]171. See Spur.]
   1. To drive back or away, as with the foot; to kick.
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            [The bird] with his foot will spurn adown his cup.
                                                  --Chaucer.
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            I spurn thee like a cur out of my way. --Shak.
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   2. To reject with disdain; to scorn to receive or accept; to
      treat with contempt.
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            What safe and nicely I might well delay
            By rule of knighthood, I disdain and spurn. --Shak.
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            Domestics will pay a more cheerful service when they
            find themselves not spurned because fortune has laid
            them at their master's feet.          --Locke.
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The Collaborative International Dictionary of English v.0.48:

Spurn \Spurn\, v. i.
   1. To kick or toss up the heels.
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            The miller spurned at a stone.        --Chaucer.
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            The drunken chairman in the kennel spurns. --Gay.
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   2. To manifest disdain in rejecting anything; to make
      contemptuous opposition or resistance.
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            Nay, more, to spurn at your most royal image.
                                                  --Shak.
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The Collaborative International Dictionary of English v.0.48:

Spurn \Spurn\, n.
   1. A kick; a blow with the foot. [R.]
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            What defense can properly be used in such a
            despicable encounter as this but either the slap or
            the spurn?                            --Milton.
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   2. Disdainful rejection; contemptuous treatment.
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            The insolence of office, and the spurns
            That patient merit of the unworthy takes. --Shak.
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   3. (Mining) A body of coal left to sustain an overhanging
      mass.
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WordNet (r) 3.0 (2006):

spurn
    v 1: reject with contempt; "She spurned his advances" [syn:
         reject, spurn, freeze off, scorn, pooh-pooh,
         disdain, turn down]

Moby Thesaurus II by Grady Ward, 1.0:

106 Moby Thesaurus words for "spurn":
   abjure, ban, banish, beat back, blackball, brush aside, brush off,
   cast out, chase, chase away, chase off, chuck, chuck out,
   cold-shoulder, contemn, contradict, cut, cut direct, decline, deny,
   deport, despise, disapprove, discard, disclaim, discount, disdain,
   disfellowship, dismiss, disown, disregard, drive away, drive back,
   except, exclude, excommunicate, exile, expatriate, expel,
   extradite, fend off, flout, forswear, fugitate, fuss, hold off,
   humiliation, ignore, keep off, look down upon, ostracize, outlaw,
   pack off, pass by, pass up, pick and choose, proscribe, push aside,
   push back, put back, rebuff, recant, refuse, refuse to consider,
   refuse to receive, reject, relegate, renounce, repel, reprobate,
   repudiate, repulse, rusticate, scoff, scorn, scorn to receive,
   scout, send away, send down, send off, send packing,
   send to Coventry, shove away, slight, sneer, sneer at, sneeze at,
   sniff, snort, snub, spit upon, spurning, steer clear of,
   the cold shoulder, the go-by, throw away, throw out, thrust back,
   thrust out, transport, turn away, turn back, turn down, turn out,
   waive, ward off