Or-thŏg'ra-phy, n.

n. [Gr. ὀρθογραφία, from ὀρθός, right, and γράφειν, to write; Lat. orthographia, It., Sp., & Pr. ortografia, Fr. orthographe.]

1. The art or practice of writing words with the proper letters, according to common usage; spelling.
2. The part of grammar which treats of the nature and properties of letters, and of the art of writing words correctly.
3. (Geom.) The delineation of an object, as the front or the section of a building, by lines and angles corresponding to those of the object; an elevation, showing all the parts in their proper proportions; — so called because all the lines are at right angles to a line drawn from the spectator to the object, or to his line of sight.