camouflage

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The method or result of concealing personnel or equipment from an enemy by making them appear to be part of the natural surroundings.
2. n. Concealment by disguise or protective coloring.
3. n. Fabric or a garment dyed in splotches of green, brown, tan, and black so as to make the wearer indistinguishable from the surrounding environment.
4. v. To conceal by the use of disguise or by protective coloring or garments that blend in with the surrounding environment.
5. v. To conceal, usually through misrepresentation or other artifice: camouflaged their hatred with professions of friendship. See Synonyms at disguise.
6. v. To use protective coloring or garments for concealment.

Wiktionary

1. n. A disguise or covering up.
2. n. The act of disguising.
3. n. The use of natural or artificial material on personnel, objects, or tactical positions with the aim of confusing, misleading, or evading the enemy.(JP 1-02 Department of Defense Dictionary of Military and Associated Terms).
4. n. A pattern on clothing consisting of irregularly shaped patches that are either greenish/brownish, brownish/whitish, or bluish/whitish, as used by ground combat forces.
5. n. Resemblance of an organism to its surroundings for avoiding detection
6. n. Clothes made from camouflage fabric, for concealment in combat or hunting.
7. v. To hide or disguise something by covering it up or changing the way it looks.

WordNet 3.0

1. n. the act of concealing the identity of something by modifying its appearance
2. n. fabric dyed with splotches of green and brown and black and tan; intended to make the wearer of a garment made of this fabric hard to distinguish from the background
3. n. device or stratagem for concealment or deceit
4. v. disguise by camouflaging; exploit the natural surroundings to disguise something
5. n. an outward semblance that misrepresents the true nature of something