any attire that modifies the appearance in order to conceal the wearer's identity(noun.artifact)
source: wordnet30
the act of concealing the identity of something by modifying its appearance(noun.act)
Example: He is a master of disguise.
source: wordnet30
A dress or exterior put on for purposes of concealment or of deception; as, persons doing unlawful acts in disguise are subject to heavy penalties.(noun)
source: webster1913
verb (v)
make unrecognizable(verb.perception)
Example: We disguised our faces before robbing the bank.