whistleblower

or whis·tle-blow·er

[ wis-uhl-bloh-er, hwis- ]
See synonyms for whistleblower on Thesaurus.com
noun
  1. a person who informs on another or makes public disclosure of corruption, wrongdoing, problems, or secret information, especially within an organization.

Origin of whistleblower

1
First recorded in 1965–70; whistle + blower
  • Sometimes whis·tle blow·er .

Other words from whistleblower

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

Words Nearby whistleblower

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use whistleblower in a sentence

British Dictionary definitions for whistle-blower

whistle-blower

noun
  1. 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