Camouflage

Camouflage is a method of concealment that allows a visible lifeform or object to remain indiscernible from the surrounding environment.

Camouflage was commonly used in warfare, as referenced in the Hirogen's World War II holodeck program. 

In 2154, a Romulan drone-ship utilized a multispectral emitter to generate a holographic skin as a form of camouflage. 

In 2370, Nikolai Rozhenko suggested creating an atmospheric shield on Boraal II and camouflaging the equipment to hide it from the Boraalan people, but Captain Jean-Luc Picard refused as it would violate the Prime Directive. 

A memory virus passed on from Dmitri Valtane to Tuvok in 2293 used a false childhood memory of a falling girl as camouflage to remain hidden as a repressed memory engram in the host's brain. 

Exobiologists Magnus and Erin Hansen developed bio-dampeners – which created a field around the body that simulated the physiometric conditions within a Borg vessel – as a form of camouflage to remain undetected inside of a Borg cube for hours at a time. 

In 2373, the crew of the USS Voyager helped the Sakari improve their camouflage in return for a generous quantity of gallicite.