Noun: betrayer bi'trey-u(r)
- One who reveals confidential information to the police or other authority
"The mafia liquidated the betrayer";
- informer, rat [informal], squealer, blabber [informal]
- A person who says one thing and does another
"The betrayer promised to keep the secret but immediately told everyone";
- double-crosser, double-dealer, two-timer, traitor
Derived forms: betrayers
Type of: deceiver, informant, slicker [informal], source, trickster
Encyclopedia: Betrayer