Source : Webster's Revised Unabridged Dictionary (1913)

Anagram \An"a*gram\, v. t.
   To anagrammatize.

         Some of these anagramed his name, Benlowes, into
         Benevolus.                               --Warburton.

Anagram \An"a*gram\, n. [F. anagramme, LL. anagramma, fr. Gr. ?
   back, again + ? to write. See {Graphic}.]
   Literally, the letters of a word read backwards, but in its
   usual wider sense, the change or one word or phrase into
   another by the transposition of its letters. Thus Galenus
   becomes angelus; William Noy (attorney-general to Charles I.,
   and a laborious man) may be turned into I moyl in law.

Source : WordNet®

anagram
     n : a word or phrase spelled by rearranging the letters of
         another word or phrase

anagram
     v : read letters out of order to discover a hidden meaning [syn:
          {anagrammatize}, {anagrammatise}]