The Collaborative International Dictionary of English v.0.48:

Ridge \Ridge\ (r[i^]j), n. [OE. rigge the back, AS. hrycg; akin
   to D. rug, G. r["u]cken, OHG. rucki, hrukki, Icel. hryggr,
   Sw. rugg, Dan. ryg. [root]16.]
   1. The back, or top of the back; a crest. --Hudibras.
      [1913 Webster]

   2. A range of hills or mountains, or the upper part of such a
      range; any extended elevation between valleys. "The frozen
      ridges of the Alps." --Shak.
      [1913 Webster]

            Part rise in crystal wall, or ridge direct.
                                                  --Milton.
      [1913 Webster]

   3. A raised line or strip, as of ground thrown up by a plow
      or left between furrows or ditches, or as on the surface
      of metal, cloth, or bone, etc.
      [1913 Webster]

   4. (Arch.) The intersection of two surface forming a salient
      angle, especially the angle at the top between the
      opposite slopes or sides of a roof or a vault.
      [1913 Webster]

   5. (Fort.) The highest portion of the glacis proceeding from
      the salient angle of the covered way. --Stocqueler.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ridge \Ridge\, v. t. [imp. & p. p. Ridged; p. pr. & vb. n.
   Ridging.]
   1. To form a ridge of; to furnish with a ridge or ridges; to
      make into a ridge or ridges.
      [1913 Webster]

            Bristles ranged like those that ridge the back
            Of chafed wild boars.                 --Milton.
      [1913 Webster]

   2. To form into ridges with the plow, as land.
      [1913 Webster]

   3. To wrinkle. "With a forehead ridged." --Cowper.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ridge
    n 1: a long narrow natural elevation or striation
    2: any long raised strip
    3: a long narrow natural elevation on the floor of the ocean
    4: a long narrow range of hills [syn: ridge, ridgeline]
    5: any long raised border or margin of a bone or tooth or
       membrane
    6: a beam laid along the edge where two sloping sides of a roof
       meet at the top; provides an attachment for the upper ends of
       rafters [syn: ridge, ridgepole, rooftree]
    v 1: extend in ridges; "The land ridges towards the South"
    2: plough alternate strips by throwing the furrow onto an
       unploughed strip
    3: throw soil toward (a crop row) from both sides; "He ridged
       his corn"
    4: spade into alternate ridges and troughs; "ridge the soil"
    5: form into a ridge

Moby Thesaurus II by Grady Ward, 1.0:

160 Moby Thesaurus words for "ridge":
   acme, apex, apogee, arete, back, bean, bilge, blain, bleb, blister,
   blob, boss, bow, brow, bubble, bulb, bulge, bulla, bump, bunch,
   burl, button, cahot, cap, chase, chine, climax, cloud nine, clump,
   cocker, cockle, col, comb, condyle, convex, corrugate, corrugation,
   crankle, crease, crest, crimp, crimple, crinkle, crown, crumple,
   culmen, culmination, dome, dorsal region, dorsum, dowel, ear, edge,
   emboss, esker, extreme limit, extremity, flange, flap, fold,
   furrow, gall, gnarl, handle, head, headpiece, heaven, heavens,
   height, high noon, highest pitch, highest point, hill, hogback,
   horseback, hump, hunch, jog, joggle, kame, knit, knob, knot, knur,
   knurl, limit, line, lip, loin, loop, lump, maximum, meridian, mole,
   mountain, mountaintop, ne plus ultra, nevus, no place higher,
   noddle, noggin, noodle, noon, nub, nubbin, nubble, papilloma, pate,
   peak, peg, pinnacle, pitch, plica, point, pole, poll, pucker,
   purse, raise, rib, rimple, ring, ripple, rivel, ruck, ruckle,
   rumple, saddle, saddleback, sconce, seventh heaven, shirr,
   shoulder, sky, spine, spire, strip, stud, style, summit, tab, tip,
   tip-top, top, tubercle, tubercule, upmost, upper extremity,
   uppermost, utmost, verruca, vertex, very top, vesicle, wale, wart,
   welt, wimple, wrinkle, zenith



U.S. Gazetteer Places (2000):

Ridge, NY -- U.S. Census Designated Place in New York
   Population (2000):    13380
   Housing Units (2000): 5922
   Land area (2000):     13.465679 sq. miles (34.875946 sq. km)
   Water area (2000):    0.093631 sq. miles (0.242504 sq. km)
   Total area (2000):    13.559310 sq. miles (35.118450 sq. km)
   FIPS code:            61665
   Located within:       New York (NY), FIPS 36
   Location:             40.907128 N, 72.882909 W
   ZIP Codes (1990):     11961
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Ridge, NY
    Ridge