the GNU version of the Collaborative International Dictionary of English
n. One who oppresses; one who imposes unjust burdens on others; one who harasses others with unjust laws or unreasonable severity.
The Century Dictionary and Cyclopedia
n. One who oppresses, or exercises undue severity in the use of power or authority.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a person of authority who subjects others to undue pressures
Word Usage
"Indian authorities have filed charges against Kashmiri education officials over a textbook that has the word "oppressor" next to a sketch resembling an Indian police officer."