The Collaborative International Dictionary of English v.0.48:

Warn \Warn\ (w[add]rn), v. t. [OE. wernen, AS. weornan, wyrnan.
   Cf. Warn to admonish.]
   To refuse. [Written also wern, worn.] [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wear \Wear\, v. t. [imp. Wore (w[=o]r); p. p. Worn
   (w[=o]rn); p. pr. & vb. n. Wearing. Before the 15th century
   wear was a weak verb, the imp. & p. p. being Weared.] [OE.
   weren, werien, AS. werian to carry, to wear, as arms or
   clothes; akin to OHG. werien, weren, to clothe, Goth. wasjan,
   L. vestis clothing, vestire to clothe, Gr. "enny`nai, Skr.
   vas. Cf. Vest.]
   [1913 Webster]
   1. To carry or bear upon the person; to bear upon one's self,
      as an article of clothing, decoration, warfare, bondage,
      etc.; to have appendant to one's body; to have on; as, to
      wear a coat; to wear a shackle.
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            What compass will you wear your farthingale? --Shak.
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            On her white breast a sparkling cross she wore,
            Which Jews might kiss, and infidels adore. --Pope.
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   2. To have or exhibit an appearance of, as an aspect or
      manner; to bear; as, she wears a smile on her countenance.
      "He wears the rose of youth upon him." --Shak.
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            His innocent gestures wear
            A meaning half divine.                --Keble.
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   3. To use up by carrying or having upon one's self; hence, to
      consume by use; to waste; to use up; as, to wear clothes
      rapidly.
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   4. To impair, waste, or diminish, by continual attrition,
      scraping, percussion, on the like; to consume gradually;
      to cause to lower or disappear; to spend.
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            That wicked wight his days doth wear. --Spenser.
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            The waters wear the stones.           --Job xiv. 19.
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   5. To cause or make by friction or wasting; as, to wear a
      channel; to wear a hole.
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   6. To form or shape by, or as by, attrition.
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            Trials wear us into a liking of what, possibly, in
            the first essay, displeased us.       --Locke.
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   To wear away, to consume; to impair, diminish, or destroy,
      by gradual attrition or decay.

   To wear off, to diminish or remove by attrition or slow
      decay; as, to wear off the nap of cloth.

   To wear on or To wear upon, to wear. [Obs.] "[I] weared
      upon my gay scarlet gites [gowns.]" --Chaucer.

   To wear out.
      (a) To consume, or render useless, by attrition or decay;
          as, to wear out a coat or a book.
      (b) To consume tediously. "To wear out miserable days."
          --Milton.
      (c) To harass; to tire. "[He] shall wear out the saints of
          the Most High." --Dan vii. 25.
      (d) To waste the strength of; as, an old man worn out in
          military service.

   To wear the breeches. See under Breeches. [Colloq.]
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The Collaborative International Dictionary of English v.0.48:

Worn \Worn\,
   p. p. of Wear.
   [1913 Webster]

   Worn land, land that has become exhausted by tillage, or
      which for any reason has lost its fertility.
      [1913 Webster]

WordNet (r) 3.0 (2006):

worn
    adj 1: affected by wear; damaged by long use; "worn threads on
           the screw"; "a worn suit"; "the worn pockets on the
           jacket" [ant: new]
    2: showing the wearing effects of overwork or care or suffering;
       "looking careworn as she bent over her mending"; "her face
       was drawn and haggard from sleeplessness"; "that raddled but
       still noble face"; "shocked to see the worn look of his
       handsome young face"- Charles Dickens [syn: careworn,
       drawn, haggard, raddled, worn]

Moby Thesaurus II by Grady Ward, 1.0:

169 Moby Thesaurus words for "worn":
   abated, ablated, ablative, attenuated, ausgespielt, back-number,
   banal, bare, bated, belittled, bewhiskered, biodegradable,
   bromidic, burned-out, careworn, common, commonplace, consumed,
   contracted, corny, corrosive, crumbling, curtailed, cut-and-dried,
   debilitated, decomposable, decomposing, decreased, deep-worn,
   deflated, degradable, devitalized, dilapidated, diminished,
   disabled, disintegrable, disintegrated, disintegrating,
   disintegrative, disjunctive, disruptive, dissipated, dog-eared,
   drained, drawn, drooping, droopy, dropped, dusty, effete,
   enervated, enfeebled, eroded, erosive, eviscerated, exhausted,
   fade, fagged, faint, fainting, fallen, familiar, fatigued,
   feeling faint, flagging, footsore, frazzled, fusty, gone to seed,
   good and tired, hackney, hackneyed, haggard, hand-me-down,
   hollow-eyed, incapacitated, jaded, languid, less, lesser, lower,
   lowered, mildewed, miniaturized, moldering, moldy, moss-grown,
   moth-eaten, musty, not new, old hat, pawed-over, pinched,
   platitudinous, played out, ravaged, ready to drop, reduced,
   resolvent, retrenched, ruined, ruinous, run ragged, run-down,
   rusty, sagging, sapped, scaled-down, secondhand, seedy, separative,
   sere, set, shelfworn, shopworn, shorn, shorter, shrunk, shrunken,
   smaller, solvent, spent, square, stale, stereotyped, stock,
   threadbare, time-scarred, timeworn, tired, tired-eyed, tired-faced,
   tired-looking, tired-winged, toilworn, trite, truistic, unnew,
   unoriginal, unrefreshed, unrestored, used, used up, wan,
   warmed-over, wasted, watered-down, way-weary, wayworn, weak,
   weakened, wearied, weariful, weary, weary-footed, weary-laden,
   weary-looking, weary-winged, weary-worn, well-known, well-worn,
   wilting, worn down, worn ragged, worn thin, worn to rags,
   worn to threads, worn-down, worn-out