Meanings of delation in английском

Sejanus had built up his power by fostering the system of delation.

The late Prefect however was not so prudent, and chose rather to encourage delation; but mark the consequence!

Nero's private excesses and debaucheries developed, while the horrible system of delation flourished, and prosecutions for treason abounded.

As a doctrine of the Real Presence peculiar to yourself, I can commend it to the Archbishop together with your delation of me.