The Collaborative International Dictionary of English v.0.48:

Corduroy \Cor"du*roy`\ (k[^o]r"d[-u]*roi` or k[^o]r`d[-u]*roi"),
   n. [Prob. for F. corde du roi king's cord.]
   1. A sort of cotton velveteen, having the surface raised in
      ridges.
      [1913 Webster]

   2. pl. Trousers or breeches of corduroy.
      [1913 Webster]

   Corduroy road, a roadway formed of logs laid side by side
      across it, as in marshy places; -- so called from its
      rough or ribbed surface, resembling corduroy. [U.S.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Corduroy \Cor"du*roy`\, v. t.
   To form of logs laid side by side. "Roads were corduroyed."
   --Gen. W. T. Sherman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

corduroy
    n 1: a cut pile fabric with vertical ribs; usually made of
         cotton [syn: cord, corduroy]
    2: a road made of logs laid crosswise
    v 1: build (a road) from logs laid side by side

Moby Thesaurus II by Grady Ward, 1.0:

232 Moby Thesaurus words for "corduroy":
   Aralac, Avisco, Axminster, Celanese, Dacron, Dynel, Georgette,
   Harris Tweed, Lastex, Leatherette, Orlon, Qiana, Revolite,
   Terylene, Ultrasuede, Velon, Vicara, acetate, acetate rayon,
   alpaca, arras, astrakhan, baize, batik, blanketing, broadcloth,
   broadloom, brocade, broken ground, broken water, bunting, calico,
   cambric, canaliculate, canaliculated, canvas, carpeting, cashmere,
   castor, chamfered, channeled, cheesecloth, chiffon, chinchilla,
   chintz, chop, coating, cord, corduroy road, corduroyed, corrugate,
   corrugated, corrugation, costate, cotton, crash, crepe,
   crepe de chine, cretonne, crimped, crinoline, cut, dadoed, damask,
   denim, doeskin, drill, drilling, drugget, duck, duffel, engraved,
   felt, flannel, flannelette, fleece, fluted, foulard, frieze,
   furrowed, fustian, gashed, gauze, gingham, goffered, goose bumps,
   goose pimples, gooseflesh, gossamer, gouged, grenadine, grogram,
   grooved, grosgrain, gunny, haircloth, herringbone, hessian,
   homespun, hop sacking, horripilation, horsehair, huck, huckaback,
   incised, jersey, lame, lawn, linen, linoleum, linsey-woolsey,
   lisle, list, loden, longcloth, lop, luster, mackinaw, mackintosh,
   madras, maline, manta, mantua, marquisette, mat, matting, melton,
   messaline, mohair, moire, moleskin, mousseline de soie, murrey,
   muslin, nainsook, nankeen, near-silk, net, netting, nylon,
   oil silk, oilcloth, organdy, organza, paisley, panne, panne velvet,
   pepper-and-salt, percale, pique, plaid, pleated, plush, polyester,
   pongee, poplin, print, quilting, rabbeted, radium, rayon,
   rayon casheen, rep, ribbed, rifled, ripple, rough, rugging, russet,
   rutted, rutty, sackcloth, sacking, sailcloth, sandpaper, sarcenet,
   sateen, satin, say, scored, scratched, seersucker, serge, shalloon,
   shantung, sharkskin, sheers, sheeting, shoddy, shot silk, silk,
   slit, spun rayon, stamin, stammel, stockinette, striated, stuff,
   suede, sulcate, sulcated, swansdown, tabaret, tabby, taffeta,
   taffety, tapestry, tarpaulin, tartan, terry cloth, tick, ticking,
   tricotine, troughed, tulle, tussah, tussore, tweed, twill, veiling,
   velours, velure, velvet, velveteen, voile, wash-and-wear fabric,
   washboard, watered fabric, webbing, wool, worsted, wrinkled