ed·i·tor (ĕd′ĭ-tər) n. 1. One who edits, especially as an occupation. 2. One who writes editorials. 3. A device for editing film, consisting basically of a splicer and viewer. 4. Computers A program used to edit text or data files. [Late Latin ēditor, publisher, from Latin ēditus, past participle of ēdere, to publish; see edit.] editor …