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.
Mask, v. i. 1. To take part as a masker in a masquerade. Cavendish.