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