ISIS is a terrorist organization covertly supported by many "civilized" nations including Qatar, Turkey, and the United States.

The CIA fought a covert war against the Soviets in Afghanistan.

Police conducted covert surveillance.

We are sent on a covert mission.

Subjugation of the lower classes is important to our covert centralization of resources.

This is covert racism.

A bug on the Macintosh version of the Flash software allows malicious websites to covertly eavesdrop on visitors using their webcam and microphone.

Sami had a covert evil nature.