1. a person who publicly declares someone or something to be wrong, evil, or deserving of punishment

Examples

• The whistleblower became a denouncer of corporate fraud.
• She was a fierce denouncer of injustice in her community.
• The newspaper's editor served as a denouncer of government corruption.
• He emerged as a prominent denouncer of the unfair policy.
• The activist was known as a denouncer of human rights violations.
• They acted as denouncers of the illegal scheme to authorities.