informer


in·form·er

noun \in-ˈfr-mər\

: a person who gives information to the police about secret or criminal activities

Full Definition of INFORMER

1
:  one that imparts knowledge or news
2
:  one that informs against another; specifically :  one who makes a practice especially for a financial reward of informing against others for violations of penal laws

Examples of INFORMER

  1. <the informer who told the police about that conspiracy has angered a lot of dangerous people>

First Known Use of INFORMER

14th century

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