whistle-blower

or whis·tle blow·er

[ hwis-uh l-bloh-er, wis- ]
/ ˈʰwɪs əlˌbloʊ ər, ˈwɪs- /

noun

a person who informs on another or makes public disclosure of corruption or wrongdoing.

Origin of whistle-blower

First recorded in 1965–70

Related forms

whis·tle-blow·ing, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for whistle blower

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