1. the act of informing against or accusing someone; denunciation.
Usage: formal or archaic; often implies betrayal or malicious reporting

Examples

• The delation of his colleague to the authorities shocked everyone in the office.
• In totalitarian regimes, delation was encouraged as a means of social control.
• She refused to engage in delation despite pressure from her superiors.
• The delation came from an anonymous source within the organization.
• Historical records show that delation was common during periods of political persecution.
• He was arrested based on the delation of a former friend.