In‐form″er (?), n. [From Inform, v.] 1. One who informs, animates, or inspires. Thomson.
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.