n. Anyone with overarching power or authority in a given domain.
the GNU version of the Collaborative International Dictionary of English
n. One who is lord over another or others; a superior lord; a master.
The Century Dictionary and Cyclopedia
n. One who is lord over another; a feudal superior; a master; specifically, in reference to early English history, a king of one of the Anglo-Saxon realms who enjoyed a preëminence or authority over certain other kings or chiefs.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a person who has general authority over others
Word Usage
"Then turn the bits and pieces that remain over to whatever corporate overlord is paying your tab."