Definitions of disguise:

• noun:   the act of concealing the identity of something by modifying its appearance

  Example: "He is a master of disguise"

• noun:   any attire that modifies the appearance in order to conceal the wearer's identity
• noun:   an outward semblance that misrepresents the true nature of something

  Example: "The theatrical notion of disguise is always associated with catastrophe in his stories"

• verb:   make unrecognizable

  Example: "The herb disguises the garlic taste"