editor n.

early 15c., "version, translation, a form of a literary work;" 1550s, "act of publishing," from French édition or directly from Latin editionem (nominative editio) "a bringing forth, producing," also "a statement, account," from past-participle stem of edere "bring forth, produce," from ex "out" (see ex-) + -dere, combining form of dare "to give" (from PIE root *do- "to give"). "It is awkward to speak of, e.g. 'The second edition of Campbell's edition of Plato's "Theætetus"'; but existing usage affords no satisfactory substitute for this inconvenient mode of expression" [OED].

1791, "to publish," perhaps a back-formation from editor, or from French éditer (itself a back-formation from édition) or from Latin editus, past participle of edere "give out, put out, publish" (see edition). Meaning "to supervise for publication" is from 1793. Meaning "make revisions to a manuscript, etc.," is from 1885. Related: Edited; editing. As a noun, by 1960, "an act of editing."