Covered over; private; hid; secret; disguised.

A CCTV surveillance system that uses hidden cameras and lenses is considered to be covert.

A method of hiding cameras and lenses

Hidden, secret, undeclared or unrevealed.

Secret or hidden; not openly practiced or engaged in or shown or avowed. Covert cameras.

Hidden or concealed.

is a mode of CCTV surveillance in which the camera and lens are hidden and cannot be seen.

Action performed secretively Covert action is action taken with the intent of not being spotted.  Military manoeuvres behind enemy lines are often performed in a covert manner, so that the enemy will not detect any forces in the area.  There are very few good examples of covert action as its very nature usually means that we never even know anything has happened.

A covert application refers to a situation where you don't want the subject to know that they are being watched or recorded. Also known as hidden cameras or nanny-cams.

the negative interior energy that humanity operates from; the secrets that were never to be spoken in childhood, ie… family secrets, church secrets, self secrets, and negative self-programming. Behind these stand the core issues of unfinished Mommy/Daddy business. (see Overt, Unfinished Mommy/Daddy Business)