masking

(n) the act of concealing the existence of something by obstructing the view of it
- the cover concealed their guns from enemy aircraft
cover, covering, screening,
(n) the blocking of one sensation resulting from the presence of another sensation
- he studied auditory masking by pure tones
(n) scenery used to block the audience's view of parts of the stage that should not be seen masking piece,

cover covering screening masking piece

masking paper masking piece masking tape