Definition of whistle–blower
: one who reveals something covert or who informs against another pledges to protect whistle–blowers who fear reprisals — Wall Street Jour.
whistle–blowingplay \ˈhwi-səl-ˌblō-iŋ, ˈwi-\ noun
First Known Use of whistle–blower
WHISTLE–BLOWER Defined for English Language Learners
Definition of whistle–blower for English Language Learners
: a person who tells police, reporters, etc., about something (such as a crime) that has been kept secret
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