whistle-blower

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈwhistle-ˌblower noun [countable]  TELLsomeone who tells people in authority or the public about dishonest or illegal practices at the place where they work 告发者，告密者 —whistle-blowing noun [uncountable]

Examples from the Corpus

whistle-blower• What is disturbing is that it is typical of a new intolerance against whistle-blowers that raises serious questions about free speech.• Perhaps he was viewed less as a courageous whistle-blower than as an irritating gad-fly.• The tendency of bureaucrats to take a dim view of whistle-blowers is particularly marked in the military.• One of the most moving stories, he says in an interview, is that of a young whistle-blower.

ˈwhistle-ˌblower nounChineseSyllable  

Corpus who people tells the someone about or in public authority

whistle-blower
ˈwhistle-ˌblower noun [countable]
someone who tells people in authority or the public about dishonest or illegal practices at the place where they work
—whistle-blowing noun [uncountable]

whistle-blowerBrE /ˈwɪsl bləʊə(r)/ 🔊NAmE /ˈwɪsl bloʊər/ 🔊 noun (used especially in newspapers 尤用于报章) a person who informs people in authority or the public that the company they work for is doing sth wrong or illegal （公司等处）检举揭发舞弊内情的人