INFORMER

informer, betrayer, rat, squealer, blabber

(noun) one who reveals confidential information in return for money

Source: WordNet® 3.1

Etymology

Noun

informer (plural informers)

One who informs someone else about something.

A person who tells authorities about improper or illegal activity.

One who informs, animates, or inspires.

Synonyms

• See informant

Anagrams

• reinform, reniform

Source: Wiktionary

In*form"er, n. Etym: [From Inform,v.]

1. One who informs, animates, or inspires. [Obs.] Thomson. Nature, informer of the poet's art. Pope.

2. One who informs, or imparts knowledge or news.

3. (Law)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition