editor in chief

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The editor having final responsibility for the operations and policies of a publication.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The highest ranking editor on an editorial staff.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun 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)