whistleblower

or whis·tle-blow·er

[ wis-uhl-bloh-er, hwis- ]

/ ˈwɪs əlˌbloʊ ər, ˈʰwɪs- /

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See synonyms for whistleblower on Thesaurus.com

noun

a person who informs on another or makes public disclosure of corruption, wrongdoing, problems, or secret information, especially within an organization.

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Sometimes whis·tle blow·er .

Origin of whistleblower

First recorded in 1965–70; whistle + blower

OTHER WORDS FROM whistleblower

whis·tle·blow·ing, whis·tle-blow·ing, noun, adjective

Words nearby whistleblower

whisperous, whispery, whist, whist drive, whistle, whistleblower, whistle Dixie, whistle for, whistle in the dark, whistle pig, whistler

How to use whistleblower in a sentence

Zaid said he was disappointed by the ruling in the whistleblower case.
Senior DOE Official Wants Probe Into Firing of Los Alamos Dissident|Center for Public Integrity|September 16, 2014|DAILY BEAST
Since being outed by Wakefield as the so-called “CDC whistleblower,” Dr. Thompson has issued a statement through his lawyer.
Anti-Vaxxers Have a New Hero|Russell Saunders|September 1, 2014|DAILY BEAST
What does seem clear is that Dr. Thompson had no intention of being a whistleblower in the first place.
Anti-Vaxxers Have a New Hero|Russell Saunders|September 1, 2014|DAILY BEAST
“This is what your bosses, the executives, are being evaluated for,” the whistleblower said.
Exclusive: Texas VA Run Like a ‘Crime Syndicate,’ Whistleblower Says|Jacob Siegel|May 28, 2014|DAILY BEAST

But while UConn is treating Holt as a whistleblower, it appears her sorority sisters are treating her as a traitor.
How Kappa Kappa Gamma Threw A UConn Sorority Sister Under The Bus|Emily Shire|May 15, 2014|DAILY BEAST

British Dictionary definitions for whistleblower

whistle-blower

noun

informal a person who informs on someone or puts a stop to something

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012