What is the meaning of Informer?

One who informs someone else about something.

A person who tells authorities about improper or illegal activity.

One who informs, animates, or inspires.

to inform; to enlighten; to impart knowledge (upon)

to inquire; to ask; to get information

first-person singular present passive subjunctive of īnfōrmō

alternative form of enformour

imperative of informere

Source: wiktionary.org