An employee who discloses organizational wrong-doing to parties who can take action. [6

an informant who exposes wrongdoing within an organization in the hope of stopping it; "the law gives little protection to whistleblowers who feel the public has a right to know what is going on"; "the whistleblower was fired for exposing the conditions in mental hospitals"

a government employee who is reporting on illegal and potentially treasonous activity

an employee or someone with knowledge of a violation of law occurring in a workplace and who reports this violation to a government agency

an employee who complains of company misconduct, such as health and safety violations, shareholder fraud, or financial mismanagement

an employee who exposes government abuse, fraud, mismanagement, and waste

an employee who, in good faith, reports alleged improper governmental action

an employee who reports a violation of the law by his or her employer

an employee who reports the illegal or wrongful activities of his employer or refuses to participate in those illegal or wrongful activities

an informal term used for the person making the allegations or protected disclosure

an informant, most often an employee, who reports employer misconduct

an institutional member who in good faith makes an allegation or cooperates in the investigation of an allegation

a person who exposes corruption in government or business organisations

a person who makes a disclosure about improper conduct by a public body or a public official

a public servant or public sector employee who makes known for public interest certain wrongdoings which occur in their workplace

a public servant or public sector employee who makes known public interest certain wrong doings which occur in their workplace

an employee or former employee who reports misconduct to government agencies or entities that have the authority to take corrective action.

The term for an employee who "blows the whistle" on an employer. In other words, an employee is reporting to the authorities an employer's illegal action or practice. Whistleblowers are entitled to a number of protections under state and federal law.

A whistleblower is an employee, former employee, or member of an organization, especially a business or government agency, who reports misconduct to people or entities that have the power and presumed willingness to take corrective action. Generally the misconduct is a violation of law, rule, regulation and/or a direct threat to public interest -- fraud, health, safety violations, and corruption are just a few examples. For instance, Jeffrey Wigand is well-known in the United States for exposing the Big Tobacco scandal, revealing that executives of the companies knew that cigarettes were addictive and that they added other carcinogenic ingredients to the cigarettes.