Is there an actual definition of "privileged" when it comes to the executive branch?

because it seems now that that word means "anything that could incriminate drumpf so I don't want to tell you." Another thread is on the bard about a whistle-blower claim being suppressed because it might be "privileged". Hope Hicks refused to even say what OFFICE she worked in.

How can a whistle-blower claim possibly be privileged? This implies a crime was committed, or at least a violation of established government policy, and I don't understand how either of those two things could be "privilged".

Or is all this just a matter of, "we'll do whatever the fuck we want, and have fun dragging it through the courts for a year if you ever want to know"