adjective
1.
a. : having its true character or quality concealed or disguised
the masked villainy of the man
b. : screened or concealed from view (as for protective or aesthetic reasons)
a masked battery
c. : failing to present or produce the usual symptoms : not obvious : disguised , latent
a masked fever
specifically : affected by masking
a masked virus
2.
a. : wearing or using a mask
masked bandits
masked dancers
b. : marked by or requiring the use of masks
a masked ball