The Collaborative International Dictionary of English v.0.48:

Editor \Ed"i*tor\, n. [L., that which produces, from edere to
   publish: cf. F. ['e]diteur.]
   One who edits; esp., a person who prepares, superintends,
   revises, and corrects a book, magazine, or newspaper, etc.,
   for publication.
   [1913 Webster]

WordNet (r) 3.0 (2006):

editor
    n 1: a person responsible for the editorial aspects of
         publication; the person who determines the final content of
         a text (especially of a newspaper or magazine) [syn:
         editor, editor in chief]
    2: (computer science) a program designed to perform such
       editorial functions as rearrangement or modification or
       deletion of data [syn: editor program, editor]

Moby Thesaurus II by Grady Ward, 1.0:

150 Moby Thesaurus words for "editor":
   allegorist, annotator, bibliognost, bibliographer, biblioklept,
   bibliolater, bibliomane, bibliomaniac, bibliopegist, bibliophage,
   bibliophile, bibliopole, bibliopolist, bibliotaph, bibliothec,
   bibliothecaire, bibliothecary, book agent, book collector,
   book printer, book publisher, book reviewer, book salesman,
   book-stealer, bookbinder, bookdealer, booklover, bookmaker,
   bookman, bookseller, bookworm, captious critic, carper, cataloger,
   caviler, censor, censurer, chief librarian, cicerone, city editor,
   clarifier, cognoscente, collector, college editor, columnist,
   commentator, commenter, compiler, connoisseur, copy chief,
   copy editor, copyman, copyreader, correspondent, critic,
   criticaster, criticizer, critickin, criticule, cryptanalyst,
   cryptographer, cryptologist, cub reporter, curator, decoder,
   definer, demonstrator, demythologizer, diaskeuast,
   dictionary editor, dragoman, editor-in-chief, editorial writer,
   editorialist, emendator, emender, euhemerist, executive editor,
   exegesist, exegete, exegetist, explainer, explicator, exponent,
   expositor, expounder, faultfinder, feature editor,
   foreign correspondent, gazetteer, glossarist, glossographer,
   go-between, guide, hermeneut, interpreter, interviewer, journalist,
   juvenile editor, leader writer, leg man, lexicographer, librarian,
   library director, literary critic, man of letters, managing editor,
   metaphrast, muckraker, news analyst, news editor, newsman,
   newspaperman, newspaperwoman, newswriter, oneirocritic,
   own correspondent, paragrapher, paragraphist, paraphrast,
   permissions editor, philobiblist, pressman, printer,
   production editor, publicist, publisher, reader, redactor,
   reference editor, reference librarian, reporter, reviewer, reviser,
   rewrite man, rewriter, scholiast, slotman, smellfungus, sob sister,
   social critic, special correspondent, sports editor, subeditor,
   textbook editor, textual critic, trade editor, translator,
   war correspondent, writer



The Free On-line Dictionary of Computing (30 December 2018):

editor

    A program used to edit a document.

   Different types of document have different editors, e.g. a
   text editor for text files, an image editor for
   images, an HTML editor for web pages, etc.  The term can
   be used for pretty much any kind of data modification, e.g. a
   disk sector editor which operates directly on the hard
   disk, bypassing the filesystem.

   (2007-07-11)


The Devil's Dictionary (1881-1906):

EDITOR, n.  A person who combines the judicial functions of Minos,
Rhadamanthus and Aeacus, but is placable with an obolus; a severely
virtuous censor, but so charitable withal that he tolerates the
virtues of others and the vices of himself; who flings about him the
splintering lightning and sturdy thunders of admonition till he
resembles a bunch of firecrackers petulantly uttering his mind at the
tail of a dog; then straightway murmurs a mild, melodious lay, soft as
the cooing of a donkey intoning its prayer to the evening star.
Master of mysteries and lord of law, high-pinnacled upon the throne of
thought, his face suffused with the dim splendors of the
Transfiguration, his legs intertwisted and his tongue a-cheek, the
editor spills his will along the paper and cuts it off in lengths to
suit.  And at intervals from behind the veil of the temple is heard
the voice of the foreman demanding three inches of wit and six lines
of religious meditation, or bidding him turn off the wisdom and whack
up some pathos.

    O, the Lord of Law on the Throne of Thought,
        A gilded impostor is he.
    Of shreds and patches his robes are wrought,
                His crown is brass,
                Himself an ass,
        And his power is fiddle-dee-dee.
    Prankily, crankily prating of naught,
    Silly old quilly old Monarch of Thought.
        Public opinion's camp-follower he,
        Thundering, blundering, plundering free.
                    Affected,
                        Ungracious,
                    Suspected,
                        Mendacious,
    Respected contemporaree!
                                                      J.H. Bumbleshook