\Masked\, a.
1. Wearing a mask or masks; characterized by masks;
   cincealed; hidden.
2. (Bot.) Same as {Personate}.
3. (Zo["o]l.) Having the anterior part of the head differing
   decidedly in color from the rest of the plumage; -- said
   of birds.
{Masked ball}, a ball in which the dancers wear masks.
{Masked battery} (Mil.), a battery so placed as not to be
   seen by an enemy until it opens fire. --H. L. Scott.
{Masked crab} (Zo["o]l.), a European crab ({Corystes
   cassivelaunus}) with markings on the carapace somewhat
   resembling a human face.
{Masked pig} (Zo["o]l.), a Japanese domestic hog ({Sus
   pliciceps}). Its face is deeply furrowed.