The Collaborative International Dictionary of English v.0.48:

Elephant \El"e*phant\ ([e^]l"[-e]*fant), n. [OE. elefaunt,
   olifant, OF. olifant, F. ['e]l['e]phant, L. elephantus,
   elephas, -antis, fr. Gr. 'ele`fas, 'ele`fantos; of unknown
   origin; perh. fr. Skr. ibha, with the Semitic article al, el,
   prefixed, or fr. Semitic Aleph hindi Indian bull; or cf.
   Goth. ulbandus camel, AS. olfend.]
   1. (Zo["o]l.) A mammal of the order Proboscidia and family
      Elephantidae, of which two living species, Elephas
      maximus (formerly Elephas Indicus) and Loxodonta
      Africana (formerly E. Africanus), and several fossil
      species, are known. They have five toes, a long proboscis
      or trunk, and two large ivory tusks proceeding from the
      extremity of the upper jaw, and curving upwards. The molar
      teeth are large and have transverse folds. Elephants are
      the largest land animals now existing. The elephant is
      classed as a pachyderm.
      [1913 Webster]

   2. Ivory; the tusk of the elephant. [Obs.] --Dryden.
      [1913 Webster]

   Elephant apple (Bot.), an East Indian fruit with a rough,
      hard rind, and edible pulp, borne by Feronia elephantum,
      a large tree related to the orange.

   Elephant bed (Geol.), at Brighton, England, abounding in
      fossil remains of elephants. --Mantell.

   Elephant beetle (Zo["o]l.), any very large beetle of the
      genus Goliathus (esp. G. giganteus), of the family
      Scarab[ae]id[ae]. They inhabit West Africa.

   Elephant fish (Zo["o]l.), a chim[ae]roid fish
      (Callorhynchus antarcticus), with a proboscis-like
      projection of the snout.

   Elephant paper, paper of large size, 23 [times] 28 inches.


   Double elephant paper, paper measuring 263/4 [times] 40
      inches. See Note under Paper.

   Elephant seal (Zo["o]l.), an African jumping shrew
      (Macroscelides typicus), having a long nose like a
      proboscis.

   Elephant's ear (Bot.), a name given to certain species of
      the genus Begonia, which have immense one-sided leaves.

   Elephant's foot (Bot.)
      (a) A South African plant (Testudinaria Elephantipes),
          which has a massive rootstock covered with a kind of
          bark cracked with deep fissures; -- called also
          tortoise plant. The interior part is barely edible,
          whence the plant is also called Hottentot's bread.
      (b) A genus (Elephantopus) of coarse, composite weeds.


   Elephant's tusk (Zo["o]l.), the tooth shell. See
      Dentalium.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Elephas maximus
    n 1: Asian elephant having smaller ears and tusks primarily in
         the male [syn: Indian elephant, Elephas maximus]