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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Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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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

How to use whistleblower in a sentence

That tells us he may have been more than just a “whistle-blower.”
Snowden’s Beijing Benefactors?|Gordon G. Chang|January 3, 2014|DAILY BEAST
Beijing, it appears, was able to cover its tracks while obtaining information from the so-called whistle-blower.
Snowden’s Beijing Benefactors?|Gordon G. Chang|January 3, 2014|DAILY BEAST
Her prior experience as a Wall Street whistle-blower had not left her desirous of more tumultuous press attention.
Noreen Harrington: The Mets’ Madoff Whistle-Blower|Michael Daly|March 19, 2012|DAILY BEAST
The difference between a leaker and a whistle-blower is important.
Obama Is Right to Prosecute Leakers Who Are Not the Same as Whistle-Blowers|Matthew Miller|March 10, 2012|DAILY BEAST

What do an Israeli soldier, a Houston whistle-blower, and a Swiss border-patrol officer have in common?
Eyal Press’s New Book Explores Moral Courage|Eric Herschthal|March 8, 2012|DAILY BEAST
Nay, amid all the scurry the whistle blower even took a few turns, stepping short as he did so, in order to rest his legs.
Nana, The Miller's Daughter, Captain Burle, Death of Olivier Becaille|Emile Zola

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