Other jobs carry the title of “editor” as well:
Acquisitions editors (or acquiring editors) work in book publishing, deciding which titles to publish and working with authors.
Assigning editors manage reporting assignments for news or feature publications. They decide what needs to get covered and when, and who should do it. Many other people in mass media carry the title of “editor” – city editor, desk editor, photo editor, video editor, managing editor, etc. – and their job duties vary from place to place.
Development editors (or content editors) take a longer piece of writing (a book or long-form article) from concept to final draft. They work with authors primarily on structure, flow and organization, though many do copy editing as well.
And then proofreaders are the last step before publication, checking to make sure corrections were made and no errors remain, and ensuring layout and typographical standards are met.