Mask, v. t. [imp. & p. p.Masked (?); p. pr. & vb. n.Masking.] 1. To cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor.
They must all be masked and vizarded. Shak.
2. To disguise; to cover; to hide.
Masking the business from the common eye. Shak.
3. (Mil.) (a) To conceal; also, to intervene in the line of. (b) To cover or keep in check; as, to mask a body of troops or a fortress by a superior force, while some hostile evolution is being carried out.