orthography

Short definition from Wiktionary

Noun

1. 1
   A method of representing a language or the sounds of language by written symbols; spelling.
2. 2
   A set of conventions for writing a language, including norms of spelling, capitalization, emphasis, hyphenation, punctuation, and word breaks.
3. 3
   The aspect of language study concerned with letters and their sequences in words; the study of spelling.
4. 4
   Correct spelling according to established usage; also (obsolete) pronunciation according to the spelling of a word.
5. 5
   A form of projection used to represent three-dimensional objects in two dimensions, in which all the projection lines are orthogonal or perpendicular to the projection plane; an orthographic projection, especially when used to draw an elevation, vertical projection, etc., of a building; also (obsolete) a drawing made in this way.
6. 6
   Synonym of orthographer (“someone knowledgeable in spelling rules”).

Verb

1. 1
   To spell (words) or write (text) according to established usage.