'Masking' definitions:

Definition of 'masking'

From: WordNet
noun
The act of concealing the existence of something by obstructing the view of it; "the cover concealed their guns from enemy aircraft" [syn: cover, covering, screening, masking]
noun
The blocking of one sensation resulting from the presence of another sensation; "he studied auditory masking by pure tones"
noun
Scenery used to block the audience's view of parts of the stage that should not be seen [syn: masking piece, masking]

Definition of 'Masking'

From: GCIDE
  • Mask \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. [1913 Webster]
  • They must all be masked and vizarded. --Shak. [1913 Webster]
  • 2. To disguise; to cover; to hide. [1913 Webster]
  • Masking the business from the common eye. --Shak. [1913 Webster]
  • 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. [1913 Webster]