Definitions

1. verb

to inform on or report someone or something to the authorities, typically as an act of betrayal

“The whistleblower was accused of denunciating her former colleagues to the police.”

2. verb

to give evidence against someone or something, often in a formal or official setting

“The witness was called to denunciate the defendant in the court case.”

3. noun

the act of informing on or reporting someone or something to the authorities

“The denunciation of the traitor was met with widespread outrage in the community.”