Longman Dictionary of Contemporary English - camouflage

~1 n 1 the way in which the colour or shape of something makes it difficult to see in the place where it lives  (The insect's colour provides camouflage from its enemies.) 2 a way of hiding something, especially a military object, using branches, paint etc  (anti-aircraft camouflage netting) 3 behaviour that is designed to hide something  (Aggression is often a camouflage for insecurity.) ~2 v to hide something by making it look the same as the things around it, or by making it seem like something else  (The trucks were well camouflaged with branches. | symptoms of illness camouflaged by other factors)