The Collaborative International Dictionary of English v.0.48:

Mole \Mole\, n. [AS. m[=a]l; akin to OHG. meil, Goth. mail Cf.
   Mail a spot.]
   1. A spot; a stain; a mark which discolors or disfigures.
      [Obs.] --Piers Plowman.
      [1913 Webster]

   2. A spot, mark, or small permanent protuberance on the human
      body; esp., a spot which is dark-colored, from which
      commonly issue one or more hairs.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mole \Mole\, n. [L. mola.]
   A mass of fleshy or other more or less solid matter generated
   in the uterus.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mole \Mole\, n. [F. m[^o]le, L. moles. Cf. Demolish,
   Emolument, Molest.]
   A mound or massive work formed of masonry or large stones,
   etc., laid in the sea, often extended either in a right line
   or an arc of a circle before a port which it serves to defend
   from the violence of the waves, thus protecting ships in a
   harbor; also, sometimes, the harbor itself. --Brande & C.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mole \Mole\, n. [OE. molle, either shortened fr. moldwerp, or
   from the root of E. mold soil: cf. D. mol, OD. molworp. See
   Moldwarp.]
   1. (Zool.) Any insectivore of the family Talpidae. They
      have minute eyes and ears, soft fur, and very large and
      strong fore feet.
      [1913 Webster]

   Note: The common European mole, or moldwarp (Talpa
         Europaea), is noted for its extensive burrows. The
         common American mole, or shrew mole (Scalops
         aquaticus), and star-nosed mole (Condylura cristata)
         have similar habits.
         [1913 Webster]

   Note: In the Scriptures, the name is applied to two
         unindentified animals, perhaps the chameleon and mole
         rat.
         [1913 Webster]

   2. A plow of peculiar construction, for forming underground
      drains. [U.S.]
      [1913 Webster]

   3. (fig.)A spy who lives for years an apparently normal life
      (to establish a cover) before beginning his spying
      activities.
      [PJC]

   Duck mole. See under Duck.

   Golden mole. See Chrysochlore.

   Mole cricket (Zool.), an orthopterous insect of the genus
      Gryllotalpa, which excavates subterranean galleries, and
      throws up mounds of earth resembling those of the mole. It
      is said to do damage by injuring the roots of plants. The
      common European species (Gryllotalpa vulgaris), and the
      American (Gryllotalpa borealis), are the best known.

   Mole rat (Zool.), any one of several species of Old World
      rodents of the genera Spalax, Georychus, and several
      allied genera. They are molelike in appearance and habits,
      and their eyes are small or rudimentary.

   Mole shrew (Zool.), any one of several species of
      short-tailed American shrews of the genus Blarina, esp.
      Blarina brevicauda.

   Water mole, the duck mole.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

mole \mole\ n.
   A quantity of a substance equal to the molecular weight of a
   substance expressed in grams; a gram molecule; the basic unit
   of amount of substance adopted under the System International
   d'Unites; as, he added two moles of sodium chloride to the
   medium.

   Syn: gram molecule, mol.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Mole \Mole\, v. t. [imp. & p. p. Moled; p. pr. & vb. n.
   Moling.]
   1. To form holes in, as a mole; to burrow; to excavate; as,
      to mole the earth.
      [1913 Webster]

   2. To clear of molehills. [Prov. Eng.] --Pegge.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mole
    n 1: the molecular weight of a substance expressed in grams; the
         basic unit of amount of substance adopted under the Systeme
         International d'Unites [syn: gram molecule, mole,
         mol]
    2: a spy who works against enemy espionage [syn: counterspy,
       mole]
    3: spicy sauce often containing chocolate
    4: a small congenital pigmented spot on the skin
    5: a protective structure of stone or concrete; extends from
       shore into the water to prevent a beach from washing away
       [syn: breakwater, groin, groyne, mole, bulwark,
       seawall, jetty]
    6: small velvety-furred burrowing mammal having small eyes and
       fossorial forefeet

Moby Thesaurus II by Grady Ward, 1.0:

265 Moby Thesaurus words for "mole":
   abutment, anchorage, anchorage ground, arc-boutant, arch dam,
   backstop, bamboo curtain, bank, bar, barrage, barrier, basin, bat,
   beam, bear-trap dam, beaver dam, benign tumor, berth, bilge,
   birthmark, blackhead, blain, blaze, bleb, blemish, blind man,
   blister, blob, blotch, boom, boss, bow, brand, breakwater,
   breastwork, brick wall, bubble, buffer, bulb, bulge, bulkhead,
   bulla, bulwark, bump, bunch, burl, button, buttress, buttress pier,
   buttressing, cahot, callosity, callus, cancer, carcinoma,
   caste mark, check, checkmark, chine, cicatrix, clump, cofferdam,
   comedo, condyle, convex, corn, crack, crater, craze, cut, cyst,
   dam, dapple, defacement, defect, defense, deformation, deformity,
   dike, discoloration, disfiguration, disfigurement, distortion,
   ditch, dock, dockage, dockyard, dot, dowel, dry dock, ear, earmark,
   earthwork, embankment, engraving, excrescence, fault, fence,
   flange, flap, flaw, fleck, flick, flying buttress, freckle,
   fungosity, fungus, gall, gash, gate, gnarl, graving, gravity dam,
   groin, growth, hack, handle, hanging buttress, harbor, harborage,
   haven, hemangioma, hickey, hill, hump, hunch, hydraulic-fill dam,
   intumescence, iron curtain, jam, jetty, jog, joggle, jot, jutty,
   keloid, kink, knob, knot, knur, knurl, landing, landing place,
   landing stage, leaping weir, lentigo, levee, lip, logjam, loop,
   lump, macula, malignant growth, marina, mark, marking,
   metastatic tumor, milium, milldam, moat, moorings, morbid growth,
   mottle, mound, mountain, needle scar, neoplasm, nevus, nick,
   nonmalignant tumor, notch, nub, nubbin, nubble, outgrowth,
   papilloma, parapet, patch, peg, pier, pier buttress, pimple, pit,
   pock, pockmark, point, polka dot, port, port-wine mark,
   port-wine stain, portcullis, prick, protected anchorage,
   proud flesh, puncture, pustule, quay, rampart, retaining wall, rib,
   ridge, rift, ring, road, roadblock, roads, roadstead,
   rock-fill dam, sarcoma, scab, scar, scarification, score, scotch,
   scratch, scratching, seaport, seawall, sebaceous cyst, shipyard,
   shoulder, shutter dam, slip, speck, speckle, spine, splash, split,
   splotch, spot, stain, stigma, stone wall, strawberry mark, stud,
   sty, style, tab, tattoo, tattoo mark, the blind, the sightless,
   the unseeing, tick, tittle, track, tubercle, tubercule, tumor,
   twist, verruca, vesicle, wale, wall, warp, wart, watermark, weal,
   weir, welt, wen, wharf, whitehead, wicket dam, work



Easton's 1897 Bible Dictionary:

Mole
   Heb. tinshameth (Lev. 11:30), probably signifies some species of
   lizard (rendered in R.V., "chameleon"). In Lev. 11:18, Deut.
   14:16, it is rendered, in Authorized Version, "swan" (R.V.,
   "horned owl").

     The Heb. holed (Lev. 11:29), rendered "weasel," was probably
   the mole-rat. The true mole (Talpa Europoea) is not found in
   Palestine. The mole-rat (Spalax typhlus) "is twice the size of
   our mole, with no external eyes, and with only faint traces
   within of the rudimentary organ; no apparent ears, but, like the
   mole, with great internal organs of hearing; a strong, bare
   snout, and with large gnawing teeth; its colour a pale slate;
   its feet short, and provided with strong nails; its tail only
   rudimentary."

     In Isa. 2:20, this word is the rendering of two words _haphar
   peroth_, which are rendered by Gesenius "into the digging of
   rats", i.e., rats' holes. But these two Hebrew words ought
   probably to be combined into one (lahporperoth) and translated
   "to the moles", i.e., the rat-moles. This animal "lives in
   underground communities, making large subterranean chambers for
   its young and for storehouses, with many runs connected with
   them, and is decidedly partial to the loose debris among ruins
   and stone-heaps, where it can form its chambers with least
   trouble."