sexual harassment

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

• noun Inappropriate behavior of a sexual nature, such as repeated sexual advances or offensive remarks, that occurs usually in a workplace, school, or other institutional setting, especially by a person in authority with respect to a subordinate or a student.

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

• noun Unwelcome sexual advances.
• noun Harassment that is sexual in nature.

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

• noun unwelcome sexual behavior by a supervisor toward an employee