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]

WordNet (r) 3.0 (2006):

mole cricket
    n 1: digs in moist soil and feeds on plant roots