informer

An informant, especially one who informs against others for compensation.

One who informs or animates.

One who imparts intelligence or gives information; an informant.

In law, one who communicates to a magistrate a knowledge of a violation of law; a person who lays an information against or prosecutes in the courts one who offends against the law or any penal statute.

Hence One who makes a business of informing against others; a mischief-maker.

Synonyms Informant, Informer. See informant.

One who informs, animates, or inspires.

One who informs, or imparts knowledge or news.

One who informs a magistrate of violations of law; one who informs against another for violation of some law or penal statute.

one who habitually gives information of the violation of penal statutes, with a view to a prosecution therefor.