“The rearrangement of the letters in a word or phrase to make another word or phrase. Anagrams are a common feature of crossword puzzles and are sometimes used by authors to conceal proper names. Drab is an anagram of bard; the name of Samuel Butler’s Erewhon (1872) is an anagram of nowhere.”
Excerpted from: Murphy, Bruce, ed. Benet’s Reader’s Encyclopedia, Fourth Edition. New York: Harper Collins, 1996.