DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   letter
       n 1: a written message addressed to a person or organization;
            "mailed an indignant letter to the editor" [syn: letter,
            missive]
       2: the conventional characters of the alphabet used to represent
          speech; "his grandmother taught him his letters" [syn:
          letter, letter of the alphabet, alphabetic character]
       3: owner who lets another person use something (housing usually)
          for hire
       4: a strictly literal interpretation (as distinct from the
          intention); "he followed instructions to the letter"; "he
          obeyed the letter of the law"
       5: an award earned by participation in a school sport; "he won
          letters in three sports" [syn: letter, varsity letter]
       v 1: win an athletic letter
       2: set down or print with letters
       3: mark letters on or mark with letters