In·form·er n.
 1. One who informs, animates, or inspires. [Obs.]
    Nature, informer of the poet's art.   --Pope.
 2. One who informs, or imparts knowledge or news.
 3. Law One who informs a magistrate of violations of law; one who informs against another for violation of some law or penal statute.
 Common informer Law, one who habitually gives information of the violation of penal statutes, with a view to a prosecution therefor.  --Bouvier.  --Wharton.

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