From The Collaborative International Dictionary of English v.0.48:

Orthography \Or*thog"ra*phy\, n. [OE. ortographie, OF.
   orthographie, L. orthographia, Gr. ?, fr. ? writing
   correctly; 'orqo`s right + gra`fein to write. See Ortho-,
   and Graphic.]
   [1913 Webster]
   1. The art or practice of writing words with the proper
      letters, according to standard usage; conventionally
      correct spelling; also, mode of spelling; as, his
      orthography is vicious.
      [1913 Webster]

            When spelling no longer follows the pronunciation,
            but is hardened into orthography.     --Earle.
      [1913 Webster]

   2. The part of grammar which treats of the letters, and of
      the art of spelling words correctly.
      [1913 Webster]

   3. A drawing in correct projection, especially an elevation
      or a vertical section.
      [1913 Webster]

   4. The method of spelling the words of a particular language;
      the system of symbols used for writing a language.

   5. The branch of linguistics concerned with how languages are
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