1 a person who informs against someone, esp. a criminal
2 a person who provides information
he was the President's financial informer
English Collins Dictionary - English Definition & Thesaurus
accuser, betrayer, grass (Brit. slang) Judas, nark (Brit., Austral., & N.Z. slang) sneak, squealer (slang) stool pigeon
English Collins Dictionary - English synonyms & Thesaurus
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