"The disclosure by a person, usually an employee in a government agency or private enterprise, to the public or to those in authority, of mismanagement, corruption, illegality, or some other wrongdoing."
Whistleblowing legal definition of Whistleblowing. Whistleblowing synonyms by the Free Online Law Dictionary.
: a person who tells police, reporters, etc., about something (such as a crime) that has been kept secret
Full Definition of WHISTLE-BLOWER
: one who reveals something covert or who informs against another <pledges to protect whistle–blowers who fear reprisals — Wall Street Journal>"
Whistle-blower - Definition and More from the Free Merriam-Webster Dictionary