Dictionary.com
Thesaurus.com
Synonyms

whistle-blower

British  

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In 2021, the Securities and Exchange Commission received a whistle-blower complaint alleging that RAD was lying to investors about the value of its property holdings, the Philadelphia Inquirer has reported.

From Barron's • Jun. 2, 2026

The claim alleges video captured on the devices is routed to contractors in Africa for AI training purposes, citing whistle-blower complaints.

From Barron's • Mar. 31, 2026

Well-known whistle-blower Nelson Amenya voiced similar concerns, urging the Kenyan government to release the full agreement so "we can read it for ourselves".

From BBC • Dec. 5, 2025

Another whistle-blower, a former trader of these biofuels, also speaking anonymously, gave the BBC his account of one recent case dealing with supposedly waste products.

From BBC • Apr. 8, 2025

Just as most students at Ohio State University read Liar’s Poker as a how-to manual, most TV and radio interviewers read me as a whistle-blower.

From "The Big Short" by Michael Lewis

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "whistle-blower" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com