exposer

Exposer is a noun used to describe a person who exposes something—especially wrongdoing, hypocrisy, or malpractice—by bringing it to public attention. It is relatively uncommon in standard English today.

When it does occur, the term often appears in historical or literary contexts or as a direct loan from French. In modern usage, English speakers typically use terms such as whistleblower, muckraker, or journalist to convey the idea of exposing misconduct, or they refer to a person who reveals information as a reporter or investigator.

The related noun exposé (or exposé) describes a published report, article, or documentary that uncovers wrongdoing, faults, or injustices and aims to compel accountability. Exposés are common in public-interest journalism and investigative reporting and may prompt reforms or legal action.

In other domains, exposer is not a standard term in photography or imaging. The corresponding concept there is exposure—the amount of light reaching a photosensitive surface—while to expose can mean to reveal or subject to light, not to identify someone who reveals information. As a result, exposer remains a rare or historical usage in general English, with preferred alternatives depending on context being used more widely.

See also: exposé, exposure, expose, whistleblower, muckraker, journalist.